invalid bitmap file superblock: bad magic

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Hello.

I'm trying to create internal bitmap on freshly created
raid1 array on 3.2.6 kernel.

What's going on and how to fix this problem?

[root@setebos ~]# mdadm /dev/md3 --grow --bitmap=internal                                                                                                   
mdadm: failed to set internal bitmap.
[root@setebos ~]# dmesg|tail -n 16                                                                                                                          
[10455.564598] mdadm: sending ioctl 1261 to a partition!
[10455.564601] mdadm: sending ioctl 1261 to a partition!
[10455.566566] mdadm: sending ioctl 1261 to a partition!
[10455.566570] mdadm: sending ioctl 1261 to a partition!
[10455.568480] md3: invalid bitmap file superblock: bad magic
[10455.568483] md3: bitmap file superblock:
[10455.568485]          magic: 00000000
[10455.568487]        version: 0
[10455.568489]           uuid: 00000000.00000000.00000000.00000000
[10455.568491]         events: 0
[10455.568492] events cleared: 0
[10455.568494]          state: 00000000
[10455.568495]      chunksize: 0 B
[10455.568497]   daemon sleep: 0s
[10455.568498]      sync size: 0 KB
[10455.568499] max write behind: 0
[root@setebos ~]# mdadm --detail /dev/md3
/dev/md3:
        Version : 1.2
  Creation Time : Thu Mar  8 13:54:16 2012
     Raid Level : raid1
     Array Size : 931760807 (888.60 GiB 954.12 GB)
  Used Dev Size : 931760807 (888.60 GiB 954.12 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

    Update Time : Thu Mar  8 18:46:11 2012
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : rescue:3
           UUID : 390e347b:c63b1a0e:1ff4f4a5:bc51f5c6
         Events : 24

    Number   Major   Minor   RaidDevice State
       0       8        4        0      active sync   /dev/sda4
       1       8       20        1      active sync   /dev/sdb4
[root@setebos ~]# cat /proc/mdstat
Personalities : [raid1]
md3 : active raid1 sda4[0] sdb4[1]
      931760807 blocks super 1.2 [2/2] [UU]

md1 : active raid1 sda2[0] sdb2[1]
      995904 blocks [2/2] [UU]

md0 : active raid1 sda1[0] sdb1[1]
      3999117 blocks super 1.2 [2/2] [UU]

md2 : active raid1 sda3[0] sdb3[1]
      40000754 blocks super 1.2 [2/2] [UU]
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
[root@setebos ~]#


-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/
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