core / # mdadm -X /dev/md0
mdadm: failed to read superblock of bitmap file: Success
core / # mdadm -E /dev/md0
mdadm: No md superblock detected on /dev/md0.

Dec 21 00:35:25 core md0: setting max_sectors to 128, segment boundary to 32767
Dec 21 00:35:25 core raid0: looking at hdd1
Dec 21 00:35:25 core raid0:   comparing hdd1(244195904) with hdd1(244195904)
Dec 21 00:35:25 core raid0:   END
Dec 21 00:35:25 core raid0:   ==> UNIQUE
Dec 21 00:35:25 core raid0: 1 zones
Dec 21 00:35:25 core raid0: looking at hdg1
Dec 21 00:35:25 core raid0:   comparing hdg1(244195904) with hdd1(244195904)
Dec 21 00:35:25 core raid0:   EQUAL
Dec 21 00:35:25 core raid0: looking at hdk1
Dec 21 00:35:25 core raid0:   comparing hdk1(244195904) with hdd1(244195904)
Dec 21 00:35:25 core raid0:   EQUAL
Dec 21 00:35:25 core raid0: looking at hde1
Dec 21 00:35:25 core raid0:   comparing hde1(244195904) with hdd1(244195904)
Dec 21 00:35:25 core raid0:   EQUAL
Dec 21 00:35:25 core raid0: FINAL 1 zones
Dec 21 00:35:25 core raid0: bad disk number -1 - aborting!
Dec 21 00:35:25 core md: pers->run() failed ...

core / # mdadm -Q /dev/md0
/dev/md0: 0.00KiB raid0 3 devices, 1 spare. Use mdadm --detail for more detail.
core / # mdadm --detail /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Dec 20 20:33:21 2006
     Raid Level : raid0
   Raid Devices : 3
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Wed Dec 20 20:33:21 2006
          State : active, Not Started
 Active Devices : 3
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 1

     Chunk Size : 64K

           UUID : 04e83c49:1c81d83b:b20252c6:7cb8fcea
         Events : 0.1

    Number   Major   Minor   RaidDevice State
       0      22       65        0      active sync   /dev/hdd1
       1      33        1        1      active sync   /dev/hde1
       2      57        1        2      active sync   /dev/hdk1

       3      34        1        -      spare   /dev/hdg1