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raid - superblock problem?

Hi, can someone help me understand this problem about disks/raid/superblocks

I have a sw raid5, tree IDE disks that is split up to md0/ md1/ md2/, ext3
They are all in fstab and autostarts just fine. but...

if I do :
ns01:~# mdadm --detail /dev/md0
        Version : 00.90.01
  Creation Time : Thu Dec 22 06:23:13 2005
     Raid Level : raid5
     Array Size : 48821248 (46.56 GiB 49.99 GB)
    Device Size : 24410624 (23.28 GiB 25.00 GB)
   Raid Devices : 3
  Total Devices : 3
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Fri Dec 30 00:18:42 2005
          State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 6d2dadcf:013b706c:4138686d:94f45902
         Events : 0.38448

    Number   Major   Minor   RaidDevice State
       0       3       69        0      active sync   /dev/hdb5
       1      22        5        1      active sync   /dev/hdc5
       2      22       69        2      active sync   /dev/hdd5
Here it says "Superblock is persistent", and if I do:
ns01:~# mdadm -Q /dev/md0
/dev/md0: 46.56GiB raid5 3 devices, 0 spares. Use mdadm --detail for more
/dev/md0: No md super block found, not an md component.


ns01:~# mdadm -E /dev/md0
mdadm: No super block found on /dev/md0 (Expected magic a92b4efc, got

Hwat does it mean that super block is not found? I have googled a lot
around but is not able to find out if or what to do.

Im running stable, kernel-image-2.6.8-2-686  2.6.8-16sarge1. Ihave also
tryed kernel-image-2.6.8-2-386  2.6.8-16sarge1.

It is tha same for md0-3, but they are mounted and running.

Please help


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