> I'm not sure if this is supported, by try specifying the version along
> with --examine for each of v0.90, v1.0, v1.1, and v1.2 to see if any
> difference shows. Paste the results from each.
Hi Phil
Only metadata v1.0 seems to be valid for sdc4.
$ sudo mdadm --examine /dev/sdc4 --metadata=0.9
mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000)
$
$ sudo mdadm --examine /dev/sdc4 --metadata=1.0
/dev/sdc4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x0
Array UUID : 374e689e:3bfd050c:ab0b0dce:2d50f5fd
Name : MyBookLiveDuo:3
Creation Time : Mon Sep 16 14:53:47 2013
Raid Level : linear
Raid Devices : 2
Avail Dev Size : 5851500528 (2790.21 GiB 2995.97 GB)
Used Dev Size : 0
Super Offset : 5851500528 sectors
State : clean
Device UUID : 9096f74b:0a8f2b61:93347be3:6d3b6c1b
Update Time : Mon Sep 16 14:53:47 2013
Checksum : 77aa5963 - correct
Events : 0
Rounding : 0K
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing)
$
$ sudo mdadm --examine /dev/sdc4 --metadata=1.1
mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000)
$
$ sudo mdadm --examine /dev/sdc4 --metadata=1.2
mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000)
$
$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md126 : active raid1 sdc3[2]
500724 blocks super 1.0 [2/1] [_U]
md127 : inactive sdc4[0](S)
2925750264 blocks super 1.0
unused devices: <none>
$
$ sudo mdadm --examine --scan
ARRAY /dev/md/2 metadata=1.0 UUID=7c040c5e:9c30ac6d:e534a129:20457e22 name=MyBookLiveDuo:2
ARRAY /dev/md/3 metadata=1.0 UUID=374e689e:3bfd050c:ab0b0dce:2d50f5fd name=MyBookLiveDuo:3
$
Thanks,
Amit
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