On 10/02/2011 18:03, Thomas Heilberg wrote:
[...]
root@backup-server:/media# mdadm -D /dev/md2
/dev/md2:
Version : 0.90
[...]
Chunk Size : 64K
[...]
I also tried to recreate the raid:
root@backup-server:/media# mdadm -Cv /dev/md2 -n3 -l5 /dev/loop0
/dev/loop1 /dev/loop2
mdadm: layout defaults to left-symmetric
mdadm: chunk size defaults to 512K
[...]
mdadm: Defaulting to version 1.2 metadata
Those loop devices are now trashed since you didn't re-create the array
with exactly the parameters with which it was initially created. Your
settings make me think the array was created with an older version of
mdadm; the defaults for metadata version and chunk size changed a little
while ago. Anyway, if you're trying again, you should specify -e 0.90 -c
64. While you're at it, add --assume-clean to avoid any rebuild, which
in your case may in fact destroy good data (though the array's parity
would end up consistent). Or if as you noted in your other reply you're
going to have to wait 15 hours before trying anything, maybe wait until
The Boss[1] makes a more intelligent suggestion than I can; he usually
posts at times that appear to be overnight to me but are presumably
sensible times of day for him.
Cheers,
John.
[1] Neil Brown, who lives in Sydney where it's revoltingly early in the
morning.
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