Linux726 raid0,raid1,raid5；raid 创建、保存、停止、删除
RAID创建
创建raid0
安装mdadm
yum install mdadm
mdadm --create /dev/md0 --raid-devices=2 /dev/sdb5 /dev/sdb6
[root@samba caozx26]# mdadm --create /dev/md0 --raid-devices=2 /dev/sdb3 /dev/sdb5 --level=0
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>mdadm -D /dev/md0
[root@samba caozx26]# mdadm -D /dev/md0
/dev/md0:Version : 1.2Creation Time : Fri Jul 25 22:12:14 2025Raid Level : raid0Array Size : 2093056 (2044.00 MiB 2143.29 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Fri Jul 25 22:12:14 2025State : cleanActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Chunk Size : 512KConsistency Policy : noneName : samba.web.cn:0 (local to host samba.web.cn)UUID : 5e1e51eb:33c18092:41aea8ad:0603e094Events : 0Number Major Minor RaidDevice State0 8 19 0 active sync /dev/sdb31 8 21 1 active sync /dev/sdb5
mkfs.ext4 /dev/md0
mount /dev/md0 /u1
[root@samba caozx26]# mkfs.ext4 /dev/md0
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
130816 inodes, 523264 blocks
26163 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
8176 inodes per group
Superblock backups stored on blocks:32768, 98304, 163840, 229376, 294912Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (8192 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mount /dev/md0 /u1iostat -m -d /dev/sdb[34] 2
dd if=/dev/zero of=/u1/test bs=1M count=50
[root@samba caozx26]# dd if=/dev/zero of=/u1/file bs=1M count=1024
记录了1024+0 的读入
记录了1024+0 的写出
1073741824字节(1.1 GB)已复制，3.80462 秒，282 MB/秒[root@samba caozx26]# iostat -m -d /dev/sdb[34] 2
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月25日 _x86_64_ (2 CPU)Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.10 0.00 0.01 6 32
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.50 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.50 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 97.00 0.00 48.00 0 96
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 410.50 0.01 204.00 0 408
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 1.00 0.00 0.03 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 8.00 0.00 4.00 0 8
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 1.00 0.00 0.01 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 3.00 0.00 0.03 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb3 0.00 0.00 0.00 0 0
sdb4 0.00 0.00 0.00 0 0^Cmdadm -C /dev/md0 -l 0 -n 2 /dev/sdb3 /dev/sdb4
-C 创建
-l raid等级
-n raid设备个数
Raid 1
镜像化
创建md1
mdadm -C /dev/md1 -l1 -n 2 /dev/sdb[78]
cat /proc/mdstat
[root@samba caozx26]# mdadm -C /dev/md1 -l1 -n 2 /dev/sdb[78]
mdadm: Note: this array has metadata at the start andmay not be suitable as a boot device. If you plan tostore '/boot' on this device please ensure thatyour boot-loader understands md/v1.x metadata, or use--metadata=0.90
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md1 started.
[root@samba caozx26]#[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[code@samba ~]$ mdadm -D /dev/md1
mdadm: must be super-user to perform this action
[code@samba ~]$ su - caozx26
密码：
上一次登录：五 7月 25 22:19:24 CST 2025pts/1 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Fri Jul 25 23:01:43 2025State : cleanActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 17Number Major Minor RaidDevice State0 8 23 0 active sync /dev/sdb71 8 24 1 active sync /dev/sdb8
mkfs.ext4 /dev/md1
mount /dev/md1 /u2
[root@samba caozx26]# mkfs.ext4 /dev/md1
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65408 inodes, 261632 blocks
13081 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8176 inodes per group
Superblock backups stored on blocks:32768, 98304, 163840, 229376Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mkdir /u2
[root@samba caozx26]# mount /dev/md1 /u2
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.6M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
tmpfs 98M 0 98M 0% /run/user/0
/dev/md1 990M 2.6M 921M 1% /u2
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
└─sdb8 8:24 0 1G 0 part└─md1 9:1 0 1022M 0 raid1 /u2
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm /dev/md1 -f /dev/sdb7
mdadm: set /dev/sdb7 faulty in /dev/md1
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0](F)1046528 blocks super 1.2 [2/1] [_U]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>测试热插拔
mdadm /dev/md1 -f /dev/sdb7
-f 将/dev/sdb7 标记为失效
cat /proc/mdstat
mdadm -D /dev/md1
[root@samba caozx26]# mdadm /dev/md1 -f /dev/sdb7
mdadm: set /dev/sdb7 faulty in /dev/md1
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0](F)1046528 blocks super 1.2 [2/1] [_U]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:16:17 2025State : clean, degradedActive Devices : 1Working Devices : 1Failed Devices : 1Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 19Number Major Minor RaidDevice State- 0 0 0 removed1 8 24 1 active sync /dev/sdb80 8 23 - faulty /dev/sdb7热拔
-r
remove
mdadm /dev/md1 -r /dev/sdb7
mdadm -D /dev/md1
[root@samba caozx26]# mdadm /dev/md1 -r /dev/sdb7
mdadm: hot removed /dev/sdb7 from /dev/md1
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 1Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:20:08 2025State : clean, degradedActive Devices : 1Working Devices : 1Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 20Number Major Minor RaidDevice State- 0 0 0 removed1 8 24 1 active sync /dev/sdb8热插
-a
add
mdadm /dev/md1 -a /dev/sdb7
cat /proc/mdstat
[root@samba caozx26]# mdadm /dev/md1 -a /dev/sdb7
mdadm: added /dev/sdb7
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:24:01 2025State : cleanActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 39Number Major Minor RaidDevice State2 8 23 0 active sync /dev/sdb71 8 24 1 active sync /dev/sdb8
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
RAID5创建
mdadm -C /dev/md5 -l 5 n 3 -x 1 /dev/sdb{8,9,10,11,12}
-x 热备盘
cat /proc/mdstat
mdadm -D /dev/md5
[root@samba caozx26]# mdadm -C /dev/md5 -l 5 -n 3 -x 1 /dev/sdb{9,10,11,12}
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md5 started.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3](S) sdb10[1] sdb9[0]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:40:17 2025State : cleanActive Devices : 3Working Devices : 4Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeEvents : 18Number Major Minor RaidDevice State0 8 25 0 active sync /dev/sdb91 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb113 8 28 - spare /dev/sdb12
mkfs.ext4 /dev/md5
mount /dev/md5 /u5
[root@samba caozx26]# mkfs.ext4 /dev/md5
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=1024 (log=0)
分块大小=1024 (log=0)
Stride=512 blocks, Stripe width=1024 blocks
50200 inodes, 200704 blocks
10035 blocks (5.00%) reserved for the super user
第一个数据块=1
Maximum filesystem blocks=33816576
25 block groups
8192 blocks per group, 8192 fragments per group
2008 inodes per group
Superblock backups stored on blocks:8193, 24577, 40961, 57345, 73729Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mkdir /u3
[root@samba caozx26]# mount /dev/md5 /u3
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.6M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
tmpfs 98M 0 98M 0% /run/user/0
/dev/md1 990M 2.6M 921M 1% /u2
/dev/md5 186M 1.6M 171M 1% /u3测试
mdadm /dev/md5 -f /dev/sdb8
cat /proc/mdstat
mdadm -D /dev/md5
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb9
mdadm: set /dev/sdb9 faulty in /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1] sdb9[0](F)200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1] sdb9[0](F)200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:43:53 2025State : cleanActive Devices : 3Working Devices : 3Failed Devices : 1Spare Devices : 0Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeEvents : 37Number Major Minor RaidDevice State3 8 28 0 active sync /dev/sdb121 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb110 8 25 - faulty /dev/sdb9mdadm /dev/md5 -r /dev/sdb9
cat /proc/mdstat
[root@samba caozx26]# mdadm /dev/md5 -r /dev/sdb9
mdadm: hot removed /dev/sdb9 from /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>mdadm /dev/md5 -a /dev/sdb9
[root@samba caozx26]# mdadm /dev/md5 -a /dev/sdb9
mdadm: added /dev/sdb9
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb9[5](S) sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>mdadm /dev/md5 -f /dev/sdb9
iostat -m -d /dev/sdb{9,10,11,12}
dd if=/dev/zero of=/u3/test bs=1M count=50
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb9
mdadm: set /dev/sdb9 faulty in /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb9[5](F) sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# dd if=/dev/zero of=/u3/test bs=1M count=55
记录了55+0 的读入
记录了55+0 的写出
57671680字节(58 MB)已复制，0.92156 秒，62.6 MB/秒[root@samba caozx26]# iostat -m -d /dev/sdb[9101112] 4
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CDevice: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0^C
[root@samba caozx26]# iostat -m -d /dev/sdb[9] /dev/sdb[10] /dev/sdb[11] /dev/sdb[12
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CDevice: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6[root@samba caozx26]# iostat -m -d /dev/sdb{9,10,11,12}
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CDevice: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.11 0.01 0.00 104 6
sdb10 0.16 0.02 0.00 201 6
sdb11 0.15 0.01 0.01 101 105
sdb12 0.08 0.00 0.01 2 98[root@samba caozx26]# iostat -m -d /dev/sdb{9,10,11,12} 4
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CDevice: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.11 0.01 0.00 104 6
sdb10 0.16 0.02 0.00 201 6
sdb11 0.15 0.01 0.01 101 105
sdb12 0.08 0.00 0.01 2 98Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.25 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 28.25 0.06 6.05 0 24
sdb11 29.50 0.11 6.06 0 24
sdb12 30.75 0.07 6.11 0 24Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.25 0.00 0.00 0 0
sdb11 0.25 0.00 0.00 0 0
sdb12 0.25 0.00 0.00 0 0保存RAID信息
vim /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
mdadm -D --scan >>/etc/mdadm.conf
cat /etc/mdadm.conf
[root@samba caozx26]# vim /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
[root@samba caozx26]# mdadm -D --scan >> /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424f
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f69:f9f7
raid 停止 启动
mdadm --stop /dev/md5
cat /proc/mdstat
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 17:05:05 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 17:17:53 2025State : cleanActive Devices : 3Working Devices : 4Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : faa67fd2:761e9ab1:be05833e:8fdf5c79Events : 18Number Major Minor RaidDevice State0 8 25 0 active sync /dev/sdb91 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb113 8 28 - spare /dev/sdb12
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5madam -A /dev/md5
madam -A /dev/md5 /dev/sdb{9,10,11,12}
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 not identified in config file.
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
[root@samba caozx26]# madam -A /dev/md5 /dev/sdb{9,10,11,12}
bash: madam: 未找到命令...
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdb{9,10,11,12}
mdadm: /dev/md5 has been started with 3 drives and 1 spare.
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094raid删除
umount /u3
mdadm /dev/md5 -f /dev/sdb{9,10,11,12}
mdadm /dev/md5 -r /dev/sdb{9,10,11,12}
mdadm --stop /dev/md5
[root@samba caozx26]# umount /u3
umount: /u3：未挂载
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb[9101112]
mdadm: set device faulty failed for /dev/sdb1: No such device
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb{9,10,11,12}
mdadm: set /dev/sdb9 faulty in /dev/md5
mdadm: set /dev/sdb10 faulty in /dev/md5
mdadm: set /dev/sdb11 faulty in /dev/md5
mdadm: set /dev/sdb12 faulty in /dev/md5
[root@samba caozx26]# mdadm /dev/md5 -r /dev/sdb{9,10,11,12}
mdadm: hot removed /dev/sdb9 from /dev/md5
mdadm: hot removed /dev/sdb10 from /dev/md5
mdadm: hot removed /dev/sdb11 from /dev/md5
mdadm: hot removed /dev/sdb12 from /dev/md5
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5mdadm --misc --zero-superblock /dev/sdb{9,10,11,12}
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb[9101112]
mdadm: Couldn't open /dev/sdb1 for write - not zeroing
mdadm: Couldn't open /dev/sdb2 for write - not zeroing
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb{9,10,11,12}
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# lsof /dev/sdb9
[root@samba caozx26]# dmsetup ls
vg1-lv1 (253:2)
centos-swap (253:1)
centos-root (253:0)
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# dmsetup ls
vg1-lv1 (253:2)
centos-swap (253:1)
centos-root (253:0)
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# blockdev --rereadpt /dev/sdb
blockdev: BLKRRPART ioctl 出错: 设备或资源忙
[root@samba caozx26]# blockdev --rereadpt /dev/sdb
blockdev: BLKRRPART ioctl 出错: 设备或资源忙
[root@samba caozx26]# mdadm --zero-superblock --force /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# rebootRemote side unexpectedly closed network connection────────────────────────────────────────────────────────────────────────────────────Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sat Jul 26 08:00:03 2025 from 192.168.235.1
[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksmd1 : active raid1 sdb8[1] sdb7[2]1046528 blocks super 1.2 [2/2] [UU]unused devices: <none>
[code@samba ~]$ mdadm --zero-superblock /dev/sdb9
mdadm: must be super-user to perform this action
[code@samba ~]$ su - caozx26
密码：
上一次登录：六 7月 26 09:37:52 CST 2025pts/2 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm --zero-superblock --force /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb10
mdadm: Unrecognised md component device - /dev/sdb10问题
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm -C /dev/md5 -l 5 -n 3 -x 1 /dev/sdb[9,10,11,12]
mdadm: You haven't given enough devices (real or missing) to create this array
[root@samba caozx26]# iostat -m -d /dev/sdb[9101112] 4
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CPU)Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0^C
[root@samba caozx26]# iostat -m -d /dev/sdb[9] /dev/sdb[10] /dev/sdb[11] /dev/sdb[12]
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CPU)Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f69:f9f7fbde
[root@samba caozx26]# umount /u3
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the array.
[root@samba caozx26]# mdadm -D /dev/md5
mdadm: cannot open /dev/md5: No such file or directory
[root@samba caozx26]# mdadm --start /dev/md5
mdadm: unrecognized option '--start'
Usage: mdadm --helpfor help
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb12[3] sdb9[5](S) sdb11[4] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm /dev/md5 -a /dev/sdb9
mdadm: Cannot open /dev/sdb9: Device or resource busy
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f69:f9f7fbde
[root@samba caozx26]# mdadm -stop /dev/md5
mdadm: -s does not set the mode, and so cannot be the first option.
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: Cannot get exclusive access to /dev/md5:Perhaps a running process, mounted filesystem or active volume group?
[root@samba caozx26]# umount /dev/md5
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
/dev/md1 990M 2.6M 921M 1% /u2
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the array.
[root@samba caozx26]#
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb{9,10,11,12}
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# blockdev --rereadpt /dev/sdb
blockdev: BLKRRPART ioctl 出错: 设备或资源忙
[root@samba caozx26]# mdadm --zero-superblock --force /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9没用
[root@samba caozx26]# mdadm -A /dev/md1 /dev/sdb{7,8}
mdadm: /dev/md1 has been started with 2 drives.
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdn{9,10,11,12}
mdadm: cannot open device /dev/sdn9: No such file or directory
mdadm: /dev/sdn9 has no superblock - assembly aborted
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdb{9,10,11,12}
mdadm: no recogniseable superblock on /dev/sdb9
mdadm: /dev/sdb9 has no superblock - assembly aborted
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: Cannot get exclusive access to /dev/md5:Perhaps a running process, mounted filesystem or active volume group?
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 not identified in config file.
记录
Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sat Jul 26 07:56:17 2025 from 192.168.235.1
[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[code@samba ~]$ mdadm -D /dev/md1
mdadm: must be super-user to perform this action
[code@samba ~]$ su - caozx26
密码：
上一次登录：五 7月 25 22:19:24 CST 2025pts/1 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Fri Jul 25 23:01:43 2025State : cleanActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 17Number Major Minor RaidDevice State0 8 23 0 active sync /dev/sdb71 8 24 1 active sync /dev/sdb8
[root@samba caozx26]# mkfs.ext4 /dev/md1
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65408 inodes, 261632 blocks
13081 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8176 inodes per group
Superblock backups stored on blocks:32768, 98304, 163840, 229376Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mkdir /u2
[root@samba caozx26]# mount /dev/md1 /u2
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.6M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
tmpfs 98M 0 98M 0% /run/user/0
/dev/md1 990M 2.6M 921M 1% /u2
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
└─sdb8 8:24 0 1G 0 part└─md1 9:1 0 1022M 0 raid1 /u2
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm /dev/md1 -f /dev/sdb7
mdadm: set /dev/sdb7 faulty in /dev/md1
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb8[1] sdb7[0](F)1046528 blocks super 1.2 [2/1] [_U]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:16:17 2025State : clean, degradedActive Devices : 1Working Devices : 1Failed Devices : 1Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 19Number Major Minor RaidDevice State- 0 0 0 removed1 8 24 1 active sync /dev/sdb80 8 23 - faulty /dev/sdb7
[root@samba caozx26]# mdadm /dev/md1 -r /dev/sdb7
mdadm: hot removed /dev/sdb7 from /dev/md1
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 1Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:20:08 2025State : clean, degradedActive Devices : 1Working Devices : 1Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 20Number Major Minor RaidDevice State- 0 0 0 removed1 8 24 1 active sync /dev/sdb8
[root@samba caozx26]# mdadm /dev/md1 -a /dev/sdb7
mdadm: added /dev/sdb7
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md1
/dev/md1:Version : 1.2Creation Time : Fri Jul 25 23:01:38 2025Raid Level : raid1Array Size : 1046528 (1022.00 MiB 1071.64 MB)Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)Raid Devices : 2Total Devices : 2Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:24:01 2025State : cleanActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Consistency Policy : resyncName : samba.web.cn:1 (local to host samba.web.cn)UUID : 80e23dd1:2801552f:08bf1dd9:424fb9dfEvents : 39Number Major Minor RaidDevice State2 8 23 0 active sync /dev/sdb71 8 24 1 active sync /dev/sdb8
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
└─sdb8 8:24 0 1G 0 part└─md1 9:1 0 1022M 0 raid1 /u2
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# fdisk /dev/sdb
欢迎使用 fdisk (util-linux 2.23.2)。更改将停留在内存中，直到您决定将更改写入磁盘。
使用写入命令前请三思。命令(输入 m 获取帮助)：n
All primary partitions are in use
添加逻辑分区 9
起始 扇区 (13619200-29362175，默认为 13619200)：
将使用默认值 13619200
Last 扇区, +扇区 or +size{K,M,G} (13619200-29362175，默认为 29362175)：+100M
分区 9 已设置为 Linux 类型，大小设为 100 MiB命令(输入 m 获取帮助)：P磁盘 /dev/sdb：16.1 GB, 16106127360 字节，31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x7105c8a5设备 Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
/dev/sdb2 2099200 4196351 1048576 83 Linux
/dev/sdb3 4196352 6293503 1048576 83 Linux
/dev/sdb4 6293504 29362175 11534336 5 Extended
/dev/sdb5 6295552 8392703 1048576 83 Linux
/dev/sdb6 8394752 9418751 512000 83 Linux
/dev/sdb7 9420800 11517951 1048576 83 Linux
/dev/sdb8 11520000 13617151 1048576 83 Linux
/dev/sdb9 13619200 13823999 102400 83 Linux命令(输入 m 获取帮助)：n
All primary partitions are in use
添加逻辑分区 10
起始 扇区 (13826048-29362175，默认为 13826048)：
将使用默认值 13826048
Last 扇区, +扇区 or +size{K,M,G} (13826048-29362175，默认为 29362175)：+100M
分区 10 已设置为 Linux 类型，大小设为 100 MiB命令(输入 m 获取帮助)：p磁盘 /dev/sdb：16.1 GB, 16106127360 字节，31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x7105c8a5设备 Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
/dev/sdb2 2099200 4196351 1048576 83 Linux
/dev/sdb3 4196352 6293503 1048576 83 Linux
/dev/sdb4 6293504 29362175 11534336 5 Extended
/dev/sdb5 6295552 8392703 1048576 83 Linux
/dev/sdb6 8394752 9418751 512000 83 Linux
/dev/sdb7 9420800 11517951 1048576 83 Linux
/dev/sdb8 11520000 13617151 1048576 83 Linux
/dev/sdb9 13619200 13823999 102400 83 Linux
/dev/sdb10 13826048 14030847 102400 83 Linux命令(输入 m 获取帮助)：n
All primary partitions are in use
添加逻辑分区 11
起始 扇区 (14032896-29362175，默认为 14032896)：
将使用默认值 14032896
Last 扇区, +扇区 or +size{K,M,G} (14032896-29362175，默认为 29362175)：+100M
分区 11 已设置为 Linux 类型，大小设为 100 MiB命令(输入 m 获取帮助)：n
All primary partitions are in use
添加逻辑分区 12
起始 扇区 (14239744-29362175，默认为 14239744)：
将使用默认值 14239744
Last 扇区, +扇区 or +size{K,M,G} (14239744-29362175，默认为 29362175)：+100M
分区 12 已设置为 Linux 类型，大小设为 100 MiB命令(输入 m 获取帮助)：p磁盘 /dev/sdb：16.1 GB, 16106127360 字节，31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x7105c8a5设备 Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
/dev/sdb2 2099200 4196351 1048576 83 Linux
/dev/sdb3 4196352 6293503 1048576 83 Linux
/dev/sdb4 6293504 29362175 11534336 5 Extended
/dev/sdb5 6295552 8392703 1048576 83 Linux
/dev/sdb6 8394752 9418751 512000 83 Linux
/dev/sdb7 9420800 11517951 1048576 83 Linux
/dev/sdb8 11520000 13617151 1048576 83 Linux
/dev/sdb9 13619200 13823999 102400 83 Linux
/dev/sdb10 13826048 14030847 102400 83 Linux
/dev/sdb11 14032896 14237695 102400 83 Linux
/dev/sdb12 14239744 14444543 102400 83 Linux命令(输入 m 获取帮助)：w
The partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
正在同步磁盘。
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm -C /dev/md5 -l 5 -n 3 -x 1 /dev/sdb[9,10,11,12]
mdadm: You haven't given enough devices (real or missing) to create this array
[root@samba caozx26]# mdadm -C /dec/md5 -l 5 -n 3 -x 1 /dev/sdb{9,10,11,12}
mdadm: /dec/md5 is an invalid name for an md device.
[root@samba caozx26]# mdadm -C /dev/md5 -l 5 -n 3 -x 1 /dev/sdb{9,10,11,12}
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md5 started.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3](S) sdb10[1] sdb9[0]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:40:17 2025State : cleanActive Devices : 3Working Devices : 4Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeEvents : 18Number Major Minor RaidDevice State0 8 25 0 active sync /dev/sdb91 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb113 8 28 - spare /dev/sdb12
[root@samba caozx26]# mkfs.ext4 /dev/md5
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=1024 (log=0)
分块大小=1024 (log=0)
Stride=512 blocks, Stripe width=1024 blocks
50200 inodes, 200704 blocks
10035 blocks (5.00%) reserved for the super user
第一个数据块=1
Maximum filesystem blocks=33816576
25 block groups
8192 blocks per group, 8192 fragments per group
2008 inodes per group
Superblock backups stored on blocks:8193, 24577, 40961, 57345, 73729Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mkdir /u3
[root@samba caozx26]# mount /dev/md5 /u3
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.6M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
tmpfs 98M 0 98M 0% /run/user/0
/dev/md1 990M 2.6M 921M 1% /u2
/dev/md5 186M 1.6M 171M 1% /u3
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb9
mdadm: set /dev/sdb9 faulty in /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1] sdb9[0](F)200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1] sdb9[0](F)200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 08:43:53 2025State : cleanActive Devices : 3Working Devices : 3Failed Devices : 1Spare Devices : 0Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeEvents : 37Number Major Minor RaidDevice State3 8 28 0 active sync /dev/sdb121 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb110 8 25 - faulty /dev/sdb9
[root@samba caozx26]# mdadm /dev/md5 -r /dev/sdb9
mdadm: hot removed /dev/sdb9 from /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm /dev/md5 -a /dev/sdb9
mdadm: added /dev/sdb9
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb9[5](S) sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb9
mdadm: set /dev/sdb9 faulty in /dev/md5
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb9[5](F) sdb11[4] sdb12[3] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# iostat -m -d /dev/sdb[9101112] 4
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.00 0.00 0.00 0 0
sdb2 0.00 0.00 0.00 0 0
sdb9 0.00 0.00 0.00 0 0^C
[root@samba caozx26]# iostat -m -d /dev/sdb[9] /dev/sdb[10] /dev/sdb[11] /dev/
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb1 0.03 0.00 0.01 11 59
sdb2 0.02 0.00 0.00 10 0
sdb9 0.12 0.01 0.00 104 6[root@samba caozx26]# iostat -m -d /dev/sdb{9,10,11,12}
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.11 0.01 0.00 104 6
sdb10 0.16 0.02 0.00 201 6
sdb11 0.15 0.01 0.01 101 105
sdb12 0.08 0.00 0.01 2 98[root@samba caozx26]# iostat -m -d /dev/sdb{9,10,11,12} 4
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.11 0.01 0.00 104 6
sdb10 0.16 0.02 0.00 201 6
sdb11 0.15 0.01 0.01 101 105
sdb12 0.08 0.00 0.01 2 98Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.25 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.00 0.00 0.00 0 0
sdb11 0.00 0.00 0.00 0 0
sdb12 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 28.25 0.06 6.05 0 24
sdb11 29.50 0.11 6.06 0 24
sdb12 30.75 0.07 6.11 0 24Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb9 0.00 0.00 0.00 0 0
sdb10 0.25 0.00 0.00 0 0
sdb11 0.25 0.00 0.00 0 0
sdb12 0.25 0.00 0.00 0 0^C
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
└─sdb12 8:28 0 100M 0 part└─md5 9:5 0 196M 0 raid5 /u3
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# cat /etc/mdadm.conf
cat: /etc/mdadm.conf: 没有那个文件或目录
[root@samba caozx26]# vim /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
[root@samba caozx26]# mdadm -D --scan >> /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8a
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f6
[root@samba caozx26]# umount /u3
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the
[root@samba caozx26]# mdadm --examine /dev/sdb{9,10,11,12}
/dev/sdb9:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : a5d876f6:90044ba6:b2dcb1e2:4dcd0597Update Time : Sat Jul 26 08:51:50 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : 39e145ea - correctEvents : 39Layout : left-symmetricChunk Size : 512KDevice Role : spareArray State : AAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb10:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : f637ea99:96a5d899:75793fb4:b02af133Update Time : Sat Jul 26 09:49:18 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : 3f5a4ddb - correctEvents : 40Layout : left-symmetricChunk Size : 512KDevice Role : Active device 1Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb11:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : 67814abc:deb3c29d:6c609752:76962bbcUpdate Time : Sat Jul 26 09:49:18 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : 8c36f854 - correctEvents : 40Layout : left-symmetricChunk Size : 512KDevice Role : Active device 2Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb12:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : 73b6f875:69c46b73:dbe7b74c:ae152454Update Time : Sat Jul 26 09:49:18 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : ada74490 - correctEvents : 40Layout : left-symmetricChunk Size : 512KDevice Role : Active device 0Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm --start /dev/md5
mdadm: unrecognized option '--start'
Usage: mdadm --helpfor help
[root@samba caozx26]# mdadm --start /dev/md5
mdadm: unrecognized option '--start'
Usage: mdadm --helpfor help
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
mdadm: cannot open /dev/md5: No such file or directory
[root@samba caozx26]# mdadm --start /dev/md5
mdadm: unrecognized option '--start'
Usage: mdadm --helpfor help
[root@samba caozx26]# mdadm --assemble /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the
[root@samba caozx26]# mdadm -A --run --force /dev/md5 /dev/sdb{9,10,11,12}
mdadm: clearing FAULTY flag for device 0 in /dev/md5 for /dev/sdb9
mdadm: Marking array /dev/md5 as 'clean'
mdadm: /dev/md5 has been started with 3 drives and 1 spare.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb12[3] sdb9[5](S) sdb11[4] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm /dev/md5 -a /dev/sdb9
mdadm: Cannot open /dev/sdb9: Device or resource busy
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
/dev/md1 990M 2.6M 921M 1% /u2
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
└─sdb12 8:28 0 100M 0 part└─md5 9:5 0 196M 0 raid5
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mount /dev/md5 /u3
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
/dev/md1 990M 2.6M 921M 1% /u2
/dev/md5 186M 57M 116M 33% /u3
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8a
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f6
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb12[3] sdb9[5](S) sdb11[4] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8a
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f6
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
└─sdb12 8:28 0 100M 0 part└─md5 9:5 0 196M 0 raid5 /u3
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm --examine /dev/sdb{3,5}
/dev/sdb3:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 5e1e51eb:33c18092:41aea8ad:0603e094Name : samba.web.cn:0 (local to host samba.web.cn)Creation Time : Fri Jul 25 22:12:14 2025Raid Level : raid0Raid Devices : 2Avail Dev Size : 2093056 sectors (1022.00 MiB 1071.64 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : 149f6e48:c15906ea:660a3f82:9bff595fUpdate Time : Fri Jul 25 22:12:14 2025Bad Block Log : 512 entries available at offset 8 sectorsChecksum : 850bf730 - correctEvents : 0Chunk Size : 512KDevice Role : Active device 0Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb5:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 5e1e51eb:33c18092:41aea8ad:0603e094Name : samba.web.cn:0 (local to host samba.web.cn)Creation Time : Fri Jul 25 22:12:14 2025Raid Level : raid0Raid Devices : 2Avail Dev Size : 2093056 sectors (1022.00 MiB 1071.64 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : 8e69b61d:67f67b9a:c1cf2c7e:3c4377e7Update Time : Fri Jul 25 22:12:14 2025Bad Block Log : 512 entries available at offset 8 sectorsChecksum : 8ed4674d - correctEvents : 0Chunk Size : 512KDevice Role : Active device 1Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8a
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f6
[root@samba caozx26]# mdadm -stop /dev/md5
mdadm: -s does not set the mode, and so cannot be the first option.
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: Cannot get exclusive access to /dev/md5:Perhaps a running process, moun or active volume group?
[root@samba caozx26]# umount /dev/md5
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/mapper/vg1-lv1 1.5G 4.5M 1.4G 1% /u1
/dev/md1 990M 2.6M 921M 1% /u2
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 assembled from 0 drives and 1 spare - not enough to start the
[root@samba caozx26]# dmsetup ls |grep 'sdb[9-12]'
grep: Invalid range end
[root@samba caozx26]# dmsetup ls
vg1-lv1 (253:2)
centos-swap (253:1)
centos-root (253:0)
[root@samba caozx26]# mdadm -A --force --run /dev/md5 /dev/sdb{9,10,11,12}
mdadm: /dev/md5 has been started with 3 drives and 1 spare.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb12[3] sdb9[5](S) sdb11[4] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -E /dev/sdb9
/dev/sdb9:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : a5d876f6:90044ba6:b2dcb1e2:4dcd0597Update Time : Sat Jul 26 10:43:38 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : 39e1601f - correctEvents : 40Layout : left-symmetricChunk Size : 512KDevice Role : spareArray State : AAA ('A' == active, '.' == missing, 'R' == replacing)
[root@samba caozx26]# mdadm -E /dev/sdb10
/dev/sdb10:Magic : a92b4efcVersion : 1.2Feature Map : 0x0Array UUID : 8eb69999:f822f790:5e2b4f69:f9f7fbdeName : samba.web.cn:5 (local to host samba.web.cn)Creation Time : Sat Jul 26 08:40:15 2025Raid Level : raid5Raid Devices : 3Avail Dev Size : 200704 sectors (98.00 MiB 102.76 MB)Array Size : 200704 KiB (196.00 MiB 205.52 MB)Data Offset : 4096 sectorsSuper Offset : 8 sectorsUnused Space : before=4016 sectors, after=0 sectorsState : cleanDevice UUID : f637ea99:96a5d899:75793fb4:b02af133Update Time : Sat Jul 26 11:01:00 2025Bad Block Log : 512 entries available at offset 16 sectorsChecksum : 3f5b5ea9 - correctEvents : 40Layout : left-symmetricChunk Size : 512KDevice Role : Active device 1Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
[root@samba caozx26]# mdadm -A --uuid=8eb69999:f822f790:5e2b4f69:f9f7fbde /dev
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb12[3] sdb9[5](S) sdb11[4] sdb10[1]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# umount /u3
umount: /u3：未挂载
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb[9101112]
mdadm: set device faulty failed for /dev/sdb1: No such device
[root@samba caozx26]# mdadm /dev/md5 -f /dev/sdb{9,10,11,12}
mdadm: set /dev/sdb9 faulty in /dev/md5
mdadm: set /dev/sdb10 faulty in /dev/md5
mdadm: set /dev/sdb11 faulty in /dev/md5
mdadm: set /dev/sdb12 faulty in /dev/md5
[root@samba caozx26]# mdadm /dev/md5 -r /dev/sdb{9,10,11,12}
mdadm: hot removed /dev/sdb9 from /dev/md5
mdadm: hot removed /dev/sdb10 from /dev/md5
mdadm: hot removed /dev/sdb11 from /dev/md5
mdadm: hot removed /dev/sdb12 from /dev/md5
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb[9101112]
mdadm: Couldn't open /dev/sdb1 for write - not zeroing
mdadm: Couldn't open /dev/sdb2 for write - not zeroing
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb{9,10,11,12}
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# lsof /dev/sdb9
[root@samba caozx26]# dmsetup ls
vg1-lv1 (253:2)
centos-swap (253:1)
centos-root (253:0)
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm --misc --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# dmsetup ls
vg1-lv1 (253:2)
centos-swap (253:1)
centos-root (253:0)
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# blockdev --rereadpt /dev/sdb
blockdev: BLKRRPART ioctl 出错: 设备或资源忙
[root@samba caozx26]# blockdev --rereadpt /dev/sdb
blockdev: BLKRRPART ioctl 出错: 设备或资源忙
[root@samba caozx26]# mdadm --zero-superblock --force /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# rebootRemote side unexpectedly closed network connection──────────────────────────────────────────────────────────────────────────────Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sat Jul 26 08:00:03 2025 from 192.168.235.1
[code@samba ~]$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksmd1 : active raid1 sdb8[1] sdb7[2]1046528 blocks super 1.2 [2/2] [UU]unused devices: <none>
[code@samba ~]$ mdadm --zero-superblock /dev/sdb9
mdadm: must be super-user to perform this action
[code@samba ~]$ su - caozx26
密码：
上一次登录：六 7月 26 09:37:52 CST 2025pts/2 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm --zero-superblock --force /dev/sdb9
mdadm: Unrecognised md component device - /dev/sdb9
[root@samba caozx26]# mdadm --zero-superblock /dev/sdb10
mdadm: Unrecognised md component device - /dev/sdb10
[root@samba caozx26]# ┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Fri Jul 25 21:22:16 2025 from 192.168.235.1
[code@samba ~]$ dd if=/dev/zero of=/u1/file bs=1M count=1024
dd: 打开"/u1/file" 失败: 权限不够
[code@samba ~]$ su - caozx26
密码：
上一次登录：五 7月 25 21:23:15 CST 2025pts/0 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# dd if=/dev/zero of=/u1/file bs=1M count=1024
记录了1024+0 的读入
记录了1024+0 的写出
1073741824字节(1.1 GB)已复制，3.80462 秒，282 MB/秒
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.4M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/md0 2.0G 1.1G 832M 56% /u1
[root@samba caozx26]#
Network error: Software caused connection abort────────────────────────────────────────────────────────────────────────────────────Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Fri Jul 25 22:16:39 2025 from 192.168.235.1
[code@samba ~]$ hostname
samba.web.cn
[code@samba ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
└─sdb8 8:24 0 1G 0 part└─md1 9:1 0 1022M 0 raid1
sr0 11:0 1 4.4G 0 rom /mnt
[code@samba ~]$ watch -n 1 cat /proc/mdstat
[code@samba ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm /u1
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1 /u2
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5 /u3
└─sdb12 8:28 0 100M 0 part└─md5 9:5 0 196M 0 raid5 /u3
sr0 11:0 1 4.4G 0 rom /mnt
[code@samba ~]$ dd if=/dev/zero of=/u3/text bs=1M count=55
dd: 打开"/u3/text" 失败: 权限不够
[code@samba ~]$ su - caozx26
密码：
上一次登录：六 7月 26 08:09:04 CST 2025pts/3 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# dd if=/dev/zero of=/u3/test bs=1M count=55
记录了55+0 的读入
记录了55+0 的写出
57671680字节(58 MB)已复制，0.92156 秒，62.6 MB/秒
[root@samba caozx26]#
Remote side unexpectedly closed network connection────────────────────────────────────────────────────────────────────────────────────Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sat Jul 26 14:31:49 2025 from 192.168.235.1
[code@samba ~]$ cat /etc/mdadm.conf
DEVICES /dev/sdb[3456789101112]
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424f
ARRAY /dev/md5 metadata=1.2 name=samba.web.cn:5 UUID=8eb69999:f822f790:5e2b4f69:f9f7
[code@samba ~]$ vim /etc/mdadm.conf
[code@samba ~]$ su - caozx26
密码：
上一次登录：六 7月 26 14:34:36 CST 2025pts/0 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# vim /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# mdadm -D --scan >>/etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424f
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
├─sdb10 8:26 0 100M 0 part
├─sdb11 8:27 0 100M 0 part
└─sdb12 8:28 0 100M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# madam --stop /dev/md5
bash: madam: 未找到命令...
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: error opening /dev/md5: No such file or directory
[root@samba caozx26]# mdadm --stop /dev/md1
mdadm: stopped /dev/md1
[root@samba caozx26]# mdadm -a /dev/md1
mdadm: error opening /dev/md1: No such file or directory
[root@samba caozx26]# mdadm -A /dev/md1
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -A /dev/md1 /dev/sdb{7,8}
mdadm: /dev/md1 has been started with 2 drives.
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdn{9,10,11,12}
mdadm: cannot open device /dev/sdn9: No such file or directory
mdadm: /dev/sdn9 has no superblock - assembly aborted
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdb{9,10,11,12}
mdadm: no recogniseable superblock on /dev/sdb9
mdadm: /dev/sdb9 has no superblock - assembly aborted
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -C /dev/md5 -l 5 -n 3 -x 1 /dev/sdb{9,10,11,12}
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md5 started.
[root@samba caozx26]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md5 : active raid5 sdb11[4] sdb12[3](S) sdb10[1] sdb9[0]200704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]md1 : active raid1 sdb7[2] sdb8[1]1046528 blocks super 1.2 [2/2] [UU]md0 : active raid0 sdb5[1] sdb3[0]2093056 blocks super 1.2 512k chunksunused devices: <none>
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 17:05:05 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 17:05:07 2025State : cleanActive Devices : 3Working Devices : 4Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : faa67fd2:761e9ab1:be05833e:8fdf5c79Events : 18Number Major Minor RaidDevice State0 8 25 0 active sync /dev/sdb91 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb113 8 28 - spare /dev/sdb12
[root@samba caozx26]# mkfs.ext4 /dev/md5
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=1024 (log=0)
分块大小=1024 (log=0)
Stride=512 blocks, Stripe width=1024 blocks
50200 inodes, 200704 blocks
10035 blocks (5.00%) reserved for the super user
第一个数据块=1
Maximum filesystem blocks=33816576
25 block groups
8192 blocks per group, 8192 fragments per group
2008 inodes per group
Superblock backups stored on blocks:8193, 24577, 40961, 57345, 73729Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# ls /
aa3 boot etc mysql-5.6.31.tar.gz sys
aa4 cmake.sh home opt tmp
aa5 dev httpd-2.4.37 proc u01
aa6 dir1 httpd-2.4.37.tar.bz2 root u02
app dir11 lib run u1
apr-1.5.2 dir12 lib64 samba u2
apr-1.5.2.tar.bz2 dir13 media sbin u3
apr-util-1.5.4.tar.bz2 dir2 mnt shop usr
bin dir3 mysql-5.6.31 srv var
[root@samba caozx26]# mount /dev/md5 /u5
mount: 挂载点 /u5 不存在
[root@samba caozx26]# mount /dev/md5 /u3
[root@samba caozx26]# mdadm -D --scan >> /etc/madam.conf
[root@samba caozx26]# cat /etc/madam.conf
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md5 metadata=1.2 spares=1 name=samba.web.cn:5 UUID=faa67fd2:761e9ab1:be05833e:8fdf5c79
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: Cannot get exclusive access to /dev/md5:Perhaps a running process, mounted filesystem or active volume group?
[root@samba caozx26]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.5M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 8.0G 9.1G 47% /
/dev/sda1 1014M 172M 843M 17% /boot
/dev/sr0 4.4G 4.4G 0 100% /mnt
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1001
/dev/md5 186M 1.6M 171M 1% /u3
[root@samba caozx26]# umount /u3
[root@samba caozx26]# mdadm -D /dev/md5
/dev/md5:Version : 1.2Creation Time : Sat Jul 26 17:05:05 2025Raid Level : raid5Array Size : 200704 (196.00 MiB 205.52 MB)Used Dev Size : 100352 (98.00 MiB 102.76 MB)Raid Devices : 3Total Devices : 4Persistence : Superblock is persistentUpdate Time : Sat Jul 26 17:17:53 2025State : cleanActive Devices : 3Working Devices : 4Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 512KConsistency Policy : resyncName : samba.web.cn:5 (local to host samba.web.cn)UUID : faa67fd2:761e9ab1:be05833e:8fdf5c79Events : 18Number Major Minor RaidDevice State0 8 25 0 active sync /dev/sdb91 8 26 1 active sync /dev/sdb104 8 27 2 active sync /dev/sdb113 8 28 - spare /dev/sdb12
[root@samba caozx26]# mdadm --stop /dev/md5
mdadm: stopped /dev/md5
[root@samba caozx26]# mdadm -A /dev/md5
mdadm: /dev/md5 not identified in config file.
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
[root@samba caozx26]# madam -A /dev/md5 /dev/sdb{9,10,11,12}
bash: madam: 未找到命令...
[root@samba caozx26]# mdadm -A /dev/md5 /dev/sdb{9,10,11,12}
mdadm: /dev/md5 has been started with 3 drives and 1 spare.
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
[root@samba caozx26]# mdadm -D --scan >> /etc/mdadm.conf
[root@samba caozx26]# cat /etc/mdadm.conf
DEVICES /dev/sdb{3,4,5,6,7,8,9,10,11,12}
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
ARRAY /dev/md0 metadata=1.2 name=samba.web.cn:0 UUID=5e1e51eb:33c18092:41aea8ad:0603e094
ARRAY /dev/md1 metadata=1.2 name=samba.web.cn:1 UUID=80e23dd1:2801552f:08bf1dd9:424fb9df
ARRAY /dev/md5 metadata=1.2 spares=1 name=samba.web.cn:5 UUID=faa67fd2:761e9ab1:be05833e:8fdf5c79
[root@samba caozx26]# cat /proc/mdstat条带化
逻辑卷条带化
lvcreate -n lv2 -l400 vg2 -i 2 /dev/sdb{6,13}
iostat -m -d /dev/sdb{6,13} 2
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
└─sdb12 8:28 0 100M 0 part└─md5 9:5 0 196M 0 raid5
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Croot centos -wi-ao---- <17.00gswap centos -wi-ao---- 2.00glv1 vg1 -wi-a----- 1.50g
[root@samba caozx26]# pvcreate /dev/sdb6Physical volume "/dev/sdb6" successfully created.
[root@samba caozx26]# vgcreate vg2 /dev/sdb6Volume group "vg2" successfully created
[root@samba caozx26]# fdisk /dev/sdb
欢迎使用 fdisk (util-linux 2.23.2)。更改将停留在内存中，直到您决定将更改写入磁盘。
使用写入命令前请三思。命令(输入 m 获取帮助)：p磁盘 /dev/sdb：16.1 GB, 16106127360 字节，31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x7105c8a5设备 Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
/dev/sdb2 2099200 4196351 1048576 83 Linux
/dev/sdb3 4196352 6293503 1048576 83 Linux
/dev/sdb4 6293504 29362175 11534336 5 Extended
/dev/sdb5 6295552 8392703 1048576 83 Linux
/dev/sdb6 8394752 9418751 512000 83 Linux
/dev/sdb7 9420800 11517951 1048576 83 Linux
/dev/sdb8 11520000 13617151 1048576 83 Linux
/dev/sdb9 13619200 13823999 102400 83 Linux
/dev/sdb10 13826048 14030847 102400 83 Linux
/dev/sdb11 14032896 14237695 102400 83 Linux
/dev/sdb12 14239744 14444543 102400 83 Linux命令(输入 m 获取帮助)：n
All primary partitions are in use
添加逻辑分区 13
起始 扇区 (14446592-29362175，默认为 14446592)：
将使用默认值 14446592
Last 扇区, +扇区 or +size{K,M,G} (14446592-29362175，默认为 29362175)：+500M
分区 13 已设置为 Linux 类型，大小设为 500 MiB命令(输入 m 获取帮助)：P磁盘 /dev/sdb：16.1 GB, 16106127360 字节，31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x7105c8a5设备 Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
/dev/sdb2 2099200 4196351 1048576 83 Linux
/dev/sdb3 4196352 6293503 1048576 83 Linux
/dev/sdb4 6293504 29362175 11534336 5 Extended
/dev/sdb5 6295552 8392703 1048576 83 Linux
/dev/sdb6 8394752 9418751 512000 83 Linux
/dev/sdb7 9420800 11517951 1048576 83 Linux
/dev/sdb8 11520000 13617151 1048576 83 Linux
/dev/sdb9 13619200 13823999 102400 83 Linux
/dev/sdb10 13826048 14030847 102400 83 Linux
/dev/sdb11 14032896 14237695 102400 83 Linux
/dev/sdb12 14239744 14444543 102400 83 Linux
/dev/sdb13 14446592 15470591 512000 83 Linux命令(输入 m 获取帮助)：W
The partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
正在同步磁盘。
[root@samba caozx26]# partprobe /dev/sdb
[root@samba caozx26]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 15G 0 disk
├─sdb1 8:17 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb2 8:18 0 1G 0 part
│ └─vg1-lv1 253:2 0 1.5G 0 lvm
├─sdb3 8:19 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb4 8:20 0 512B 0 part
├─sdb5 8:21 0 1G 0 part
│ └─md0 9:0 0 2G 0 raid0
├─sdb6 8:22 0 500M 0 part
├─sdb7 8:23 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb8 8:24 0 1G 0 part
│ └─md1 9:1 0 1022M 0 raid1
├─sdb9 8:25 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb10 8:26 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb11 8:27 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
├─sdb12 8:28 0 100M 0 part
│ └─md5 9:5 0 196M 0 raid5
└─sdb13 8:29 0 500M 0 part
sr0 11:0 1 4.4G 0 rom /mnt
[root@samba caozx26]# pvcreate /dev/sdb13Physical volume "/dev/sdb13" successfully created.
[root@samba caozx26]# vgsVG #PV #LV #SN Attr VSize VFreecentos 1 2 0 wz--n- <19.00g 0vg1 2 1 0 wz--n- 1.99g 504.00mvg2 1 0 0 wz--n- 496.00m 496.00m
[root@samba caozx26]# vgextend vg2 /dev/sdb13Volume group "vg2" successfully extended
[root@samba caozx26]# vgsVG #PV #LV #SN Attr VSize VFreecentos 1 2 0 wz--n- <19.00g 0vg1 2 1 0 wz--n- 1.99g 504.00mvg2 2 0 0 wz--n- 992.00m 992.00m
[root@samba caozx26]# lvcreate -n lv2 -l200 vg2 -i 2 /dev/sdb{6,13}Using default stripesize 64.00 KiB.Logical volume "lv2" created.
[root@samba caozx26]# lvs /dev/vg2/lv2LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convlv2 vg2 -wi-a----- 800.00m
[root@samba caozx26]# pvs /dev/sdb[613]Failed to find physical volume "/dev/sdb3".PV VG Fmt Attr PSize PFree/dev/sdb1 vg1 lvm2 a-- 1020.00m 0/dev/sdb6 vg2 lvm2 a-- 496.00m 96.00m
[root@samba caozx26]# pvs /dev/sdb{6,13}PV VG Fmt Attr PSize PFree/dev/sdb13 vg2 lvm2 a-- 496.00m 96.00m/dev/sdb6 vg2 lvm2 a-- 496.00m 96.00m
[root@samba caozx26]# mkfs.ext4 /dev/vg2/lv2
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=16 blocks, Stripe width=32 blocks
51296 inodes, 204800 blocks
10240 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=209715200
7 block groups
32768 blocks per group, 32768 fragments per group
7328 inodes per group
Superblock backups stored on blocks:32768, 98304, 163840Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (4096 blocks): 完成
Writing superblocks and filesystem accounting information: 完成[root@samba caozx26]# mkdir /u2
mkdir: 无法创建目录"/u2": 文件已存在
[root@samba caozx26]# mkdir /ut2
[root@samba caozx26]# mount /dev/vg2/lv2 /ut2
[root@samba caozx26]# yum install sysstat
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
local1
软件包 sysstat-10.1.5-19.el7.x86_64 已安装并且是最新版本
无须任何处理
[root@samba caozx26]# iostat -m -d /dev/sdb{6,13} 2
Linux 3.10.0-1160.el7.x86_64 (samba.web.cn) 2025年07月26日 _x86_64_ (2 CPU)Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.02 0.00 0.00 8 16
sdb13 0.01 0.00 0.00 7 15Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 37.50 0.01 18.00 0 36
sdb13 36.50 0.00 18.00 0 36Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 1.00 0.00 0.02 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 14.00 0.00 7.00 0 14
sdb13 14.00 0.00 7.00 0 14Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.50 0.00 0.01 0 0
sdb13 0.50 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sdb6 0.00 0.00 0.00 0 0
sdb13 0.00 0.00 0.00 0 0^C
[root@samba caozx26]#[root@samba caozx26]# dd if=/dev/zero of=/ut2/test bs=1M count=100
记录了100+0 的读入
记录了100+0 的写出
104857600字节(105 MB)已复制，1.2072 秒，86.9 MB/秒
[root@samba caozx26]#
