First i run zero superblock with mdadm v2.0-devel from current dir:
root@localhost:~/dev/mdadm-2.0-devel-1# ./mdadm --zero-superblock /dev/hdc
Then examine the superblock using mdadm v2.0-devel from current dir:
root@localhost:~/dev/mdadm-2.0-devel-1# ./mdadm -E /dev/hdc /dev/hdc: Magic : a92b4efc Version : 01.00 Array UUID : f4b2dc026e:a3cc3e95:de0563f5:199250 Name : Creation Time : Tue May 3 11:16:22 2005 Raid Level : raid5 Raid Devices : 3
Device Size : 390721952 (186.31 GiB 200.05 GB) Super Offset : 390721952 sectors State : active Device UUID : f4b2dc026e:a3cc3e95:de0563f5:199250 Update Time : Tue May 3 11:16:22 2005 Checksum : d4cd5d80 - correct Events : 0
Layout : -unknown- Chunk Size : 64K
Array State : Uuu 381 spares
Then i try using mdadm v1.9.0 (from system path):
root@localhost:~/dev/mdadm-2.0-devel-1# mdadm --version
mdadm - v1.9.0 - 04 February 2005
root@localhost:~/dev/mdadm-2.0-devel-1# mdadm -E /dev/hdc
mdadm: No super block found on /dev/hdc (Expected magic a92b4efc, got 00000000)
Then i try erasing the superblock again with mdadm v1.9.0 from system path:
root@pink:~/dev/mdadm-2.0-devel-1# mdadm --version mdadm - v1.9.0 - 04 February 2005 root@pink:~/dev/mdadm-2.0-devel-1# mdadm --zero-superblock /dev/hdc mdadm: /dev/hdc does not appear to have an MD superblock.
Then examine it again with mdadm v2.0-devel from current dir:
root@pink:~/dev/mdadm-2.0-devel-1# ./mdadm -E /dev/hdc /dev/hdc: Magic : a92b4efc Version : 01.00 Array UUID : f4b2dc026e:a3cc3e95:de0563f5:199250 Name : Creation Time : Tue May 3 11:16:22 2005 Raid Level : raid5 Raid Devices : 3
Device Size : 390721952 (186.31 GiB 200.05 GB) Super Offset : 390721952 sectors State : active Device UUID : f4b2dc026e:a3cc3e95:de0563f5:199250 Update Time : Tue May 3 11:16:22 2005 Checksum : d4cd5d80 - correct Events : 0
Layout : -unknown- Chunk Size : 64K
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