mdadm
作者 佚名技术
来源 Linux系统
浏览
发布时间 2012-05-16
|
| Array Size : 112320 (109.71 MiB 115.02 MB)
Device Size : 112320 (109.71 MiB 115.02 MB)
Raid Devices : 2 Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sat Jan 1 05:08:27 2000
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 797b80d8:4b70e2d1:7e427c7e:c9546d1b
Events : 0.10
Number Major Minor RaidDevice State
0 8 10 0 active sync /dev/sda10
1 8 26 1 active sync /dev/sdb10
# cat /proc/mdstat Personalities :
md0 : active raid1 sda10[0] sdb10[1]
112320 blocks [2/2] [UU] raid autodetect
unused devices: <none>
＃ mount /dev/md0 /share/raid （挂载raid）
＃ cp /share/partitionA2 /share/raid
＃ ls /share/raid
lost found asdf.asf
netatalk.tar
# umount /share/raid
# mdadm /dev/md0 -f /dev/sda10
# mdadm /dev/md0 -r /dev/sda10 (将sda10从raid中移除)
# mdadm -D /dev/md0
/dev/md0:
Version : 00.90.01
Creation Time : Sat Jan 1 02:45:14 2000
Raid Level : raid1
Array Size : 112320 (109.71 MiB 115.02 MB)
Device Size : 112320 (109.71 MiB 115.02 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sat Jan 1 05:30:28 2000
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 797b80d8:4b70e2d1:7e427c7e:c9546d1b Events : 0.52
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 26 1 active sync /dev/sdb10
# cat /proc/mdstat Personalities : 将sda10的分区类型改为linux (即83),然后重启,重新挂载,查看分区里的文件：
md0 : active raid1 sdb10[1]
112320 blocks [2/1] [_U]
unused devices: <none>
# fdisk /dev/sda # reboot 和原来作为raid时的内容完全一样,说明raid1 的确是在每个硬盘都写入数据,有较高的可靠性.
t-->11 --> 83 --> w
# mount /dev/sda10 /share/partition
# ls /share/partition
lost found asdf.asf
netatalk.tar
4．3 数据恢复：
下面在sda上新建另一分区,sda11,并把它作为raid1的一个分区,即替代原来的sda10；
# mdadm /dev/md0 -a /dev/sda11
mdadm: hot added /dev/sda11
# mdadm -D /dev/md0
/dev/md0:
Version : 00.90.01
Creation Time : Sat Jan 1 02:45:14 2000
Raid Level : raid1
Array Size : 112320 (109.71 MiB 115.02 MB)
Device Size : 112320 (109.71 MiB 115.02 MB)
Raid Devices : 2
Total Devices : 3
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sat Jan 1 05:50:00 2000
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 0
Spare Devices : 1
UUID : 797b80d8:4b70e2d1:7e427c7e:c9546d1b
Ev |
凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务，公司网站：http://www.lingzhong.cn
为了给广大客户了解更多的技术信息，本技术文章收集来源于网络,凌众科技尊重文章作者的版权，如果有涉及你的版权有必要删除你的文章，请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息，谢谢!
|
