recovering from raid5 corruption
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compounding this issue was that I had already had one disk in the raid5 go bad and was in the process of getting it replaced.
this raid array was 5 disks.What I mean by corrupted is that the superblock of 3 of the remaining 4 devices seemed to have been wiped out (i.e. had a UUID of all 0s, though still enough that it knew it was part of an md device)
now, the one whose superblock seems fine, places it at position disk 3 (of 0-4) and the missing disk at disk 2.
this would imply that there are only 6 permutations possible for the other 3 disks. (even if that assumptions is wrong, there are only 120 permutations possible, which I should easily be able to iterate over).
further compounding this, is that there were 2 LVM logical disks on the physical raid device.
I've tried being cute and trying all 6 permutations to force recreate the array, but lvm isn't picking up anything. (pvscan/lvscan/lvmdiskscan)
The original raid had a version of 0.90.00 (created in 2008), while the new one has a version 1.20.
have I ruined any chances of recovery by shooting in the dark with my cute attempts, am I SOL or is there a better/proper way I can try to recover this data?
Luckily for me, I've been on a backup binge of late, but there still about 500-1TB of stuff that wasn't backed up.
thanks, any help would be appreciated. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html