操作版本

[[email protected] ~]uname �Ca

Linux zzsrv2.bigcloud.local 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

分区

Disk /dev/sdb: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/sdc: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/sdd: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

[[email protected] ~]# mkfs.ext3 /dev/sdb

修改类型为fd

Command (m for help): t

Selected partition 1

Hex code (type L to list codes): fd

Changed system type of partition 1 to fd (Linux raid autodetect)

建立raid5

[[email protected] ~]# mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sdd1

mdadm: Defaulting to version 1.2 metadata

mdadm: array /dev/md0 started.

[[email protected] ~]#mkfs.ext3 /dev/md0

写入配置

[r[email protected] ~]# mdadm --detail --scan >> /etc/mdadm.conf

[[email protected] ~]# cat /proc/mdstat

\Personalities : [raid6] [raid5] [raid4]

md0 : active raid5 sdd1[3] sdc1[1] sdb1[0]

41895936 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]

[=>...................]  recovery =  9.5% (1991296/20947968) finish=7.2min speed=43472K/sec

unused devices:

挂载

[[email protected] ~]# mkdir /data/

[[email protected] ~]# mount /dev/md0 /data

[[email protected] ~]# ll /data/

total 16

drwx------ 2 root root 16384 Aug  5 11:16 lost+found

[[email protected] data]# vi /etc/fstab

在末尾添加如下内容,设置成为默认启动

/dev/md0                /data                   ext4    defaults        0 0

建立文件实验

[[email protected] ~]# cd /data

[[email protected] data]# touch 123

[[email protected] data]# touch 1234

模拟故障

在虚拟机外先把sdb1移除.再进命令行敲

[[email protected] ~]#mdadm /dev/md0 --fail /dev/sdb1

mdadm: set /dev/sdb1 faulty in /dev/md0

.

[[email protected] data]#mdadm /dev/md0 --remove /dev/sdb1

mdadm: hot removed /dev/sdb1 from /dev/md0

[[email protected] ~]# reboot

[[email protected] ~]# mdadm /dev/md0 --add /dev/sdb1

ndadm：added/dev/sdb1

[[email protected] ~]# ll /data

total 16

drwx------ 2 root root 16384 Aug  6 16:47 lost+found

-rw-r--r-- 1 root root     0 Aug  6 16:48 q1

-rw-r--r-- 1 root root     0 Aug  6 16:49 q2

-rw-r--r-- 1 root root     0 Aug  6 16:49 q3

-rw-r--r-- 1 root root     0 Aug  6 16:53 q4

本文出自 “李景祥” 博客，谢绝转载！