I recently installed a server with mirrored disks using software RAID.
Everything was working fine for a few days until a normal reboot (not
the first). Now the machine will not boot because it appears the
superblock is wrong on some of the RAID devices on the first disk.
The rough layout of the disks (sda and sdb):
sdx1 (md0) - /
sdx2 (md1) - /var
sdx3 (md2) - /usr
extended partition with swap
sdx6 (md3) - /opt
The exact error is:
"invalid superblock checksum on sda3
sda3 has invalid sb, not importing!"
Booting into a live CD, mdadm -E /dev/sdaX shows that the checksum is
not what would be expected for sda1,2,3 but is fine for sda6. All of
the checksums on drive sdb are correct.
The state is "clean" for all partitions, working 2, active 2 and
failed 0. The table for sdb1,2,3 shows that the first device has been
removed and is no longer an active mirror.
What is the best way to proceed here? Can I somehow sync from the
second disk, which appears to have the correct checksums? Is there an
easy way to fix this that wont involve loosing the data?
Thanks.
-
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
