smartctl says Overall health...: passed for all drives.
This is interesting(?)
mdadm --examine for sda2 and b2 list:
Array State as : AAAA
But sdc2 and d2 list it as ..AA
root@sysresccd /mnt % mdadm --examine /dev/sda2
/dev/sda2:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : cf0bf1b9:f57b96be:8c749fcb:cea10311
Name : 'localhost.localdomain':1
Creation Time : Sat Oct 25 16:11:56 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 11712653168 (5585.03 GiB 5996.88 GB)
Array Size : 17568979392 (16755.08 GiB 17990.63 GB)
Used Dev Size : 11712652928 (5585.03 GiB 5996.88 GB)
Super Offset : 11712653296 sectors
Unused Space : before=0 sectors, after=368 sectors
State : clean
Device UUID : 0953e84c:a25760b0:28a20bab:bd1dc41b
Internal Bitmap : 2 sectors from superblock
Update Time : Sat Dec 6 14:00:02 2014
Checksum : dfe27505 - correct
Events : 3
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 0
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@sysresccd /mnt % mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : cf0bf1b9:f57b96be:8c749fcb:cea10311
Name : 'localhost.localdomain':1
Creation Time : Sat Oct 25 16:11:56 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 11712653168 (5585.03 GiB 5996.88 GB)
Array Size : 17568979392 (16755.08 GiB 17990.63 GB)
Used Dev Size : 11712652928 (5585.03 GiB 5996.88 GB)
Super Offset : 11712653296 sectors
Unused Space : before=0 sectors, after=368 sectors
State : clean
Device UUID : d96a56d4:c5ac346a:24765692:501f6f22
Internal Bitmap : 2 sectors from superblock
Update Time : Sat Dec 6 14:00:02 2014
Checksum : f1ab789 - correct
Events : 3
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 1
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@sysresccd /mnt % mdadm --examine /dev/sdc2
/dev/sdc2:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : cf0bf1b9:f57b96be:8c749fcb:cea10311
Name : 'localhost.localdomain':1
Creation Time : Sat Oct 25 16:11:56 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 11712653168 (5585.03 GiB 5996.88 GB)
Array Size : 17568979392 (16755.08 GiB 17990.63 GB)
Used Dev Size : 11712652928 (5585.03 GiB 5996.88 GB)
Super Offset : 11712653296 sectors
Unused Space : before=0 sectors, after=368 sectors
State : clean
Device UUID : 17d61cf2:2c0c4765:cb4c478c:4828aefc
Internal Bitmap : 2 sectors from superblock
Update Time : Sun Dec 7 11:18:06 2014
Checksum : fc228d5e - correct
Events : 8
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 2
Array State : ..AA ('A' == active, '.' == missing, 'R' == replacing)
root@sysresccd /mnt % mdadm --examine /dev/sdd2
/dev/sdd2:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : cf0bf1b9:f57b96be:8c749fcb:cea10311
Name : 'localhost.localdomain':1
Creation Time : Sat Oct 25 16:11:56 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 11712653168 (5585.03 GiB 5996.88 GB)
Array Size : 17568979392 (16755.08 GiB 17990.63 GB)
Used Dev Size : 11712652928 (5585.03 GiB 5996.88 GB)
Super Offset : 11712653296 sectors
Unused Space : before=0 sectors, after=368 sectors
State : clean
Device UUID : 306bde8a:3beebe54:52e6acd2:f7681367
Internal Bitmap : 2 sectors from superblock
Update Time : Sun Dec 7 11:18:06 2014
Checksum : 3526df7d - correct
Events : 8
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 3
Array State : ..AA ('A' == active, '.' == missing, 'R' == replacing)
On 14 December 2014 at 00:06, Emery Guevremont
<emery.guevremont@xxxxxxxxx> wrote:
> Stop your raid with mdadm -S /dev/md0 or whatever your raid device name is.
>
> Probably the safest thing to do is clone your drives with ddrescue.
> You might also want to view your S.M.A.R.T. log with smarctl -a
> /dev/sda or which ever is your device name.
>
> After, what you'd need to start doing is taking a backup of mdadm
> --examine /dev/sda1 or which ever partition is your partition used for
> raid. This will give us info on you md superblock. Post this info and
> from there we'll be able to see how everything is setup and have a
> better idea of your current situation.
>
> On Fri, Dec 12, 2014 at 7:48 PM, Neil . <neil.perrie@xxxxxxxxx> wrote:
>> I am looking for some help in trying to recover a raid 5 volume. Is
>> this the right place? What data should I provide to get the ball
>> rolling?
>>
-snip-
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