mdadm: failed to write superblock to

[sebastian <centos@xxxxxxxxxxxxxxxx>]

Hello,

i have a little problem. Our server has an broken RAID.

# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sda1[2](F) sdb1[1]
       2096064 blocks [2/1] [_U]

md2 : active raid1 sda3[2](F) sdb3[1]
       1462516672 blocks [2/1] [_U]

md1 : active raid1 sda2[0] sdb2[1]
       524224 blocks [2/2] [UU]

unused devices: <none>


I have remove the partition:

# mdadm --remove /dev/md0 /dev/sda1
mdadm: hot removed /dev/sda1 from /dev/md0

# mdadm --remove /dev/md2 /dev/sda3
mdadm: hot removed /dev/sda3 from /dev/md2


Now i want to add the old partition (to sync the raid), unfortunately, 
comes an error message:
# mdadm --add /dev/md0 /dev/sda1
mdadm: failed to write superblock to /dev/sda1


What is wrong here? Here some more details:

# mdadm --detail /dev/md0
/dev/md0:
         Version : 0.90
   Creation Time : Fri Sep  2 12:38:17 2011
      Raid Level : raid1
      Array Size : 2096064 (2047.28 MiB 2146.37 MB)
   Used Dev Size : 2096064 (2047.28 MiB 2146.37 MB)
    Raid Devices : 2
   Total Devices : 1
Preferred Minor : 0
     Persistence : Superblock is persistent

     Update Time : Thu Jun  7 08:57:12 2012
           State : clean, degraded
  Active Devices : 1
Working Devices : 1
  Failed Devices : 0
   Spare Devices : 0

            UUID : 9beaf2eb:4b5c7416:776c2c25:004bd7b2
          Events : 0.147

     Number   Major   Minor   RaidDevice State
        0       0        0        0      removed
        1       8       17        1      active sync   /dev/sdb1


Thanks Sebastian
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos