Software RAID1 recovery

SickBoy · Nov 28, 2006

OK, I have a software RAID1 that has had some problems. The machine has been powered off w/o proper shutdown a couple of times due to power issues.

I had 2 drives, each 100GB, mirrored. I know at least one is still good, but both complain of an invalid superblock when I try to start the array.

Is there any way, since this is a RAID1 array, to pull the known good drive out of the array and fix it so it will function as a single drive? fsck doesn't seem to be able to locate the superblock either, but from what I understand, a RAID superblock exists on a different part of the disk (compared to a normal superblock).

Help? (gulp)

uOpt · Nov 28, 2006

Sure, just start a raid1 with one drive.

e.g.
mdadm --assemble /dev/md0 /dev/sda1

SickBoy · Nov 29, 2006

Code:

alice akruse # mdadm --assemble --force /dev/md0 /dev/hdc1
mdadm: no recogniseable superblock on /dev/hdc1
mdadm: /dev/hdc1 has no superblock - assembly aborted

uOpt · Dec 4, 2006

So what happens if you try it on the other drive?

Software RAID1 recovery

SickBoy

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uOpt

Member

SickBoy

Inactive Moderator

uOpt

Member

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