如何修复软RAID5

wheel

fsck.ext3 /dev/md0
e2fsck 1.35 (28-Feb-2004)
fsck.ext3: Filesystem revision too high while trying to open /dev/md0
The filesystem revision is apparently too high for this version of e2fsck.
(Or the filesystem superblock is corrupt)


The superblock could not be read or does not describe a correct ext2
filesystem.  If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>

wheel

fdisk  -l /dev/md0

Disk /dev/md0: 1500.3 GB, 1500315451392 bytes
2 heads, 4 sectors/track, 366287952 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Disk /dev/md0 doesn't contain a valid partition table

wheel

mdadm --detail /dev/md0 /dev/md0:
        Version : 00.90.01
  Creation Time : Wed Jun  2 17:36:35 2010
     Raid Level : raid5
     Array Size : 1465151808 (1397.28 GiB 1500.32 GB)
    Device Size : 488383936 (465.76 GiB 500.11 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Wed Jun  2 17:36:35 2010
          State : clean, degraded, recovering
Active Devices : 3
Working Devices : 4
Failed Devices : 0
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 64K

Rebuild Status : 5% complete

           UUID : 477120db:0d0a7539:e2c6496e:e5199ac3
         Events : 0.1818436

    Number   Major   Minor   RaidDevice State
       0       8       65        0      active sync   /dev/sde1
       1       8       49        1      active sync   /dev/sdd1
       2       8       33        2      active sync   /dev/sdc1
       3       0        0        -      removed

       4       8       17        3      spare rebuilding   /dev/sdb1
[root@tank ~]#