Linux 软Raid创建方法：

一。Raid 0 创建

# mdadm -C /dev/md0 -n 2 -a yes -l 0 -x /dev/sdb1 /dev/sdb2 /dev/sdb3[创建Raid 0 ，其中-C 创建， -n 指定磁盘块数， -a  You haven‘t given enough devices (real or missing) to create this array, -x 指定空闲盘个数]

2. 查看

#mdadm -D /dev/md0

#cat /proc/mdstat

3. 模拟磁盘故障

#mdadm /dev/md0 -f|--fail /dev/sdb1

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

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

[[email protected] ~]# madam -D /dev/md0

-bash: madam: command not found

[[email protected] ~]# mdadm -D /dev/md0

/dev/md0:

Version : 1.2

Creation Time : Sat Apr 26 07:19:59 2014

Raid Level : raid5

Array Size : 2117632 (2.02 GiB 2.17 GB)

Used Dev Size : 1058816 (1034.17 MiB 1084.23 MB)

Raid Devices : 3

Total Devices : 4

Persistence : Superblock is persistent

Update Time : Sat Apr 26 07:30:41 2014

State : clean

Active Devices : 3

Working Devices : 3

Failed Devices : 1

Spare Devices : 0

Layout : left-symmetric

Chunk Size : 512K

Name : cnshla02.la.com:0  (local to host cnshla02.la.com)

UUID : 32d58274:62d5e406:7a0cbd5d:5cd42c00

Events : 37

Number   Major   Minor   RaidDevice State

3       8       22        0      active sync   /dev/sdb6

1       8       18        1      active sync   /dev/sdb2

4       8       19        2      active sync   /dev/sdb3

0       8       17        -      faulty spare   /dev/sdb1

4.剔除故障磁盘

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

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

5.添加磁盘到指定的raid

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

mdadm: added /dev/sdb1

Linux 软Raid创建方法：