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