I have this 3 disk raid5 volumne on an Asus motherboard sporting an
Intel Rapid Storage chipset. The problem began when I noticed in
windows that one of the hard disks (the first one in the array) was
marked as failed in the Intel raid utility. I shutdown the system to
remove the hard disk and removed the cables for the faulty hard disk.
But I made a mistake and remove the cables for one of the working hard
disks. So when I booted, it showed the raid volume as failed. I
quickly shutdown the system and corrected the mistake. But it
completely hosed my raid volume. When I booted the system up again,
both of the remaining 2 hard disks were showed as offline.
I read the raid recovery section in the wiki and installed ubuntu
12.04 on a separate non-raid hard disk (after completely disconnecting
the offline raid5 volume). Then I reconnected the 2 hard disks and
booted ubuntu. Then I gave the following commands:
1) mdadm --examine /dev/sd[bc] > raid.status
2) mdadm --create --assume-clean -c 128 --level=5 --raid-devices=3
/dev/md1 missing /dev/sdb /dev/sdc
It gave the following output:
mdadm: /dev/sdb appears to be part of a raid array:
level=container devices=0 ctime=Thu Jan 1 05:00:00 1970
mdadm: /dev/sdc appears to be part of a raid array:
level=container devices=0 ctime=Thu Jan 1 05:00:00 1970
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md1 started.
But the raid volume is not accessible. mdadm --examine /dev/md1 gives:
mdadm: No md superblock detected on /dev/md1.
Worse, upon booting the system, the raid chipset message says the 2
hard disk are non-raid hard disks. Have I completely messed up the
raid volume? Is it not recoverable at all?
Thanks.
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