rhel5中更换raid坏磁盘

一、更换raid5坏磁盘：

[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 3
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:12:39 2009
          State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.34

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       2       8       51        2      active sync   /dev/sdd3

[root@server4 ~]# mdadm --fail /dev/md0 /dev/sdd3
mdadm: set /dev/sdd3 faulty in /dev/md0
[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 3
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:13:12 2009
          State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 1
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.36

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       2       0        0        2      removed

       3       8       51        -      faulty spare   /dev/sdd3

[root@server4 ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md4 : active raid5 sde5[6](S) sdb1[0] sdd2[5] sdd1[4] sdc2[3] sdc1[2] sdb2[1]
      10040000 blocks level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]
md1 : active raid1 sdc5[1] sdb5[0]
      2008000 blocks [2/2] [UU]
md2 : active raid1 sdc6[1] sdb6[0]
      2449792 blocks [2/2] [UU]
md3 : active raid1 sdd6[1] sdd5[0]
      2008000 blocks [2/2] [UU]
md0 : active raid5 sdd3[3](F) sdc3[1] sdb3[0]
      4016000 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]
unused devices: <none>

[root@server4 ~]# mdadm --remove /dev/md0 /dev/sdd3
mdadm: hot removed /dev/sdd3
[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:14:22 2009
          State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.38

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       2       0        0        2      removed

[root@server4 ~]# mdadm -a /dev/md0 /dev/sde3
mdadm: re-added /dev/sde3
[root@server4 ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md4 : active raid5 sde5[6](S) sdb1[0] sdd2[5] sdd1[4] sdc2[3] sdc1[2] sdb2[1]
      10040000 blocks level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]
md1 : active raid1 sdc5[1] sdb5[0]
      2008000 blocks [2/2] [UU]
md2 : active raid1 sdc6[1] sdb6[0]
      2449792 blocks [2/2] [UU]
md3 : active raid1 sdd6[1] sdd5[0]
      2008000 blocks [2/2] [UU]
md0 : active raid5 sde3[3] sdc3[1] sdb3[0]
      4016000 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]
      [=&gt;...................]  recovery =  8.8% (178320/2008000) finish=1.0min speed=29720K/sec
unused devices: <none>

二、更换raid1坏磁盘：

[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 18:58:41 2009
          State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
  Spare Devices : 0

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.14

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6
       1       8       38        1      active sync   /dev/sdc6

[root@server4 ~]# mdadm --fail /dev/md2 /dev/sdc6
mdadm: set /dev/sdc6 faulty in /dev/md2
[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:16:27 2009
          State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
  Spare Devices : 0

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.16

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6

       2       8       38        -      faulty spared /dev/sdc6
[root@server4 ~]# mdadm --remove /dev/md2 /dev/sdc6
mdadm: hot removed /dev/sdc6
[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 1
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:17:02 2009
          State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
  Spare Devices : 0

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.18

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6
       1       0        0        1      removed

[root@server4 ~]# mdadm -a /dev/md2 /dev/sde6
mdadm: added /dev/sde6
[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:19:09 2009
          State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
  Spare Devices : 0

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.20

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6
       1       8       70        1      active sync   /dev/sde6

三、添加热备盘：

1.向raid5中添加热备盘：

[root@server4 ~]# mdadm -a /dev/md0 /dev/sde3
mdadm: added /dev/sde3
[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:23:16 2009
          State : clean
Active Devices : 3
Working Devices : 4
Failed Devices : 0
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.46

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       2       8       51        2      active sync   /dev/sdd3

       3       8       67        -      spare         /dev/sde3

[root@server4 ~]# mdadm -a /dev/md4 /dev/sde5
mdadm: re-added /dev/sde5
[root@server4 ~]# mdadm -D /dev/md4
/dev/md4:
        Version : 00.90.03
  Creation Time : Wed Mar 11 22:51:27 2009
     Raid Level : raid5
     Array Size : 10040000 (9.57 GiB 10.28 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 6
  Total Devices : 7
Preferred Minor : 4
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:27:16 2009
          State : clean
Active Devices : 6
Working Devices : 7
Failed Devices : 0
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 333d111c:6f4268a8:cd33842a:5daf20b9
         Events : 0.6

    Number   Major   Minor   RaidDevice State
       0       8       17        0      active sync   /dev/sdb1
       1       8       18        1      active sync   /dev/sdb2
       2       8       33        2      active sync   /dev/sdc1
       3       8       34        3      active sync   /dev/sdc2
       4       8       49        4      active sync   /dev/sdd1
       5       8       50        5      active sync   /dev/sdd2

       6       8       69        -      spare         /dev/sde5

2.向raid1中添加热备:

[root@server4 ~]# mdadm -a /dev/md2 /dev/sde6
mdadm: added /dev/sde6
[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 3
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:20:49 2009
          State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 0
  Spare Devices : 1

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.26

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6
       1       8       38        1      active sync   /dev/sdc6

       2       8       70        -      spare         /dev/sde6

以下内容是当某个磁盘出现故障的时候，热备盘会自动代替坏掉的磁盘：

[root@server4 ~]# mdadm --fail /dev/md2 /dev/sdc6
mdadm: set /dev/sdc6 faulty in /dev/md2
[root@server4 ~]# mdadm -D /dev/md2
/dev/md2:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:54:15 2009
     Raid Level : raid1
     Array Size : 2449792 (2.34 GiB 2.51 GB)
  Used Dev Size : 2449792 (2.34 GiB 2.51 GB)
   Raid Devices : 2
  Total Devices : 3
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:29:25 2009
          State : clean, degraded, recovering
Active Devices : 1
Working Devices : 2
Failed Devices : 1
  Spare Devices : 1

Rebuild Status : 32% complete

           UUID : 293a50bd:c8630ee3:4e5c7694:6db62838
         Events : 0.28

    Number   Major   Minor   RaidDevice State
       0       8       22        0      active sync   /dev/sdb6
       2       8       70        1      spare rebuilding   /dev/sde6

       3       8       38        -      faulty spare   /dev/sdc6

[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:23:16 2009
          State : clean
Active Devices : 3
Working Devices : 4
Failed Devices : 0
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.46

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       2       8       51        2      active sync   /dev/sdd3

       3       8       67        -      spare   /dev/sde3

       3       8       67        -      spare   /dev/sde3
[root@server4 ~]# mdadm --fail /dev/md0 /dev/sdd3
mdadm: set /dev/sdd3 faulty in /dev/md0
[root@server4 ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md4 : active raid5 sde5[6](S) sdb1[0] sdd2[5] sdd1[4] sdc2[3] sdc1[2] sdb2[1]
      10040000 blocks level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]
md1 : active raid1 sdc5[1] sdb5[0]
      2008000 blocks [2/2] [UU]
md2 : active raid1 sde6[1] sdc6[2](F) sdb6[0]
      2449792 blocks [2/2] [UU]
md3 : active raid1 sdd6[1] sdd5[0]
      2008000 blocks [2/2] [UU]
md0 : active raid5 sde3[3] sdd3[4](F) sdc3[1] sdb3[0]
      4016000 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]
      [=&gt;...................]  recovery =  7.3% (149456/2008000) finish=1.2min speed=24909K/sec
unused devices: <none>

[root@server4 ~]# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 11 21:52:53 2009
     Raid Level : raid5
     Array Size : 4016000 (3.83 GiB 4.11 GB)
  Used Dev Size : 2008000 (1961.27 MiB 2056.19 MB)
   Raid Devices : 3
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Mar 12 19:32:20 2009
          State : clean, degraded, recovering
Active Devices : 2
Working Devices : 3
Failed Devices : 1
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 64K

Rebuild Status : 35% complete

           UUID : 9b96b4e8:53d431df:9e9c063d:285a9865
         Events : 0.48

    Number   Major   Minor   RaidDevice State
       0       8       19        0      active sync   /dev/sdb3
       1       8       35        1      active sync   /dev/sdc3
       3       8       67        2      spare rebuilding   /dev/sde3

       4       8       51        -      faulty spare   /dev/sdd3

本文出自 “candon123” 博客，转载请与作者联系！