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Hi all,
It appears that for about a month my raid array is not working anymore
(this is an evaluation after having inspected the content of each
individual disk). I thinks it may be a bit longer. I was using raidtools
but, as I'm under unstable, this package was removed and may not have
been through that migration as well as I thought :(
After some investigation i found that it does not recognize it any more
because the two disks don't have the same UUID! as mdadm shows :
% mdadm --examine --brief --scan --config=partitions
ARRAY /dev/md0 level=raid1 num-devices=2 \
UUID=b6065276:860e04ff:432f5364:f4db028c
ARRAY /dev/md0 level=raid1 num-devices=2 \
UUID=12e709d1:8df4e5d9:e6aa987f:b3b2318a
As far as I can tell the disk actually used is /dev/sdb1 (sda1 content
is outdated).
I tried to force the array assembly but I got :
% mdadm -A /dev/md0 --force
md: md0 stopped.
mdadm: /dev/sda1 has no super block - assembly aborted
So I tried to make sda1 faulty, remove it then reinstall it; but I got :
% mdadm --fail /dev/md0 /dev/sda1
mdadm: cannot get array info for /dev/md0
As far as I understand, it's because md0 is active... but I can't
activate it; It's a dead lock !!
To break this vicious circle, I thought I could reset sda1 UUID, but how
can I know the one to use, or may I just rebuild the array (without
loosing data of course !)
Or may i use any tool to set proper super block on sda1 ?
Is there a proper way to get myself out of that mess ?
Thanks for your advice.
Nicolas.
PS : If some could explain how I get myself in that mess I would also
greatly appreciate it ... so i won't do it again !
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