On Tue, 1 May 2012 10:45:08 +0100 Brian Candler <B.Candler@xxxxxxxxx> wrote:
> On Sat, Apr 28, 2012 at 08:03:55AM +1000, NeilBrown wrote:
> > I'm afraid you've been bitten by a rather nasty bug which is present in 3.3
> > and got back ported to some -stable kernel. The fix has been submitted and
> > should be appearing in -stable kernels soon (maybe already).
>
> Do you happen to know if this bug was present in ubuntu 11.10, kernel
> versions 3.0.0-15-server or 3.0.0-16-server ?
I don't keep track of what ubuntu (or anyone but suse) put in their kernels,
sorry.
>
> I saw failures to assemble RAID6 arrays after unclean shutdowns on both of
> these, just in test environments. If it happens again I'll send mdadm
> --examine output. I just tried to replicate it and failed :-(
To replicate:
- create an array.
- stop the array
- assemble the array with at least one missing device e.g.:
mdadm -A /dev/md0 /dev/sda1 /dev/sdb1
if it was a 3-device array
- check in /proc/mdstat that it is listed as "inactivate"
- reboot
- now "mdadm -E" the devices. If the raid level is -unknown- then the bug
has hit.
NeilBrown
>
> Regards,
>
> Brian.
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