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Re: [Qemu-devel] Silent filesystem/qcow2 corruptions with qemu-kvm-1.0 a
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] Silent filesystem/qcow2 corruptions with qemu-kvm-1.0 and 1.1.1 |
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Date: |
Fri, 12 Oct 2012 10:28:31 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
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.
Have you tried raw image files? In other words, do you know that the
corruption only happens with qcow2?
Stefan