Re: [Qemu-devel] Silent filesystem/qcow2 corruptions with qemu-kvm-1.0 and 1.1.1

["Tiziano Müller" <tiziano.mueller@stepping-stone.ch>]

Am Freitag, den 12.10.2012, 10:28 +0200 schrieb Stefan Hajnoczi:
> On Thu, Oct 11, 2012 at 03:33:23PM +0200, Tiziano Müller wrote:
> > One test case was:
> > * xfs_repair /dev/vda2 -> corruptions found and fixed
> > * xfs_repair /dev/vda2 -> no corruptions found
> 
> From here...
> 
> > * mount /dev/vda2 /mnt/something
> > * find /mnt/something > /dev/null
> > * umount /mnt/something
> 
> ...to here is mostly read-only.
> 
> > * xfs_repair /dev/vda2 -> corruptions found again
> 
> And yet corruptions are reported inside the guest!
> 
> Can you retry with "mount -o ro" just for sanity?  If you still see
> corruptions when the device was mounted read-only, then perhaps the
> mount/find/umount sequence itself is innocent.

Will try as soon as possible. The problem is that we had that case twice
so far and no way to trigger it.

> 
> Have you tried raw image files?  In other words, do you know that the
> corruption only happens with qcow2?

Will do right now.

thanks a lot!

-- 
stepping stone GmbH
Neufeldstrasse 9
CH-3012 Bern
Telefon: +41 31 332 53 63
www.stepping-stone.ch
tiziano.mueller@stepping-stone.ch