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I once had issues when converting instances. Upgrading to upsteam Qemu 
1.3(.1) (merged with KVM code) fixed the bug.

Which version are you using, on which distro ?
Anyway, upgrading to qemu 1.3 is worth a try as there are many 
improvements (qemu-img check -r, GlusterFS support natively and so on...)

I guess the image is QCOW ?

-Sylvain

Le 19/03/2013 22:49, Michael Still a écrit :
> On Wed, Mar 20, 2013 at 7:48 AM, Steven Barnabas
> <sbarnabas at frontporch.com> wrote:
>
>> Kind of seems like it does not like the image?
> I Steven, sorry for the slow reply, I was on a long haul flight.
>
> Looking at this:
>
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972] ProcessExecutionError:
> Unexpected error while running command.
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972] Command: qemu-img convert -O raw
> /var/lib/nova/instances/_base/2986816d8cbac0ea14d12b014f770563ab0a0517.part
> /var/lib/nova/instances/_base/2986816d8cbac0ea14d12b014f770563ab0a0517.converted
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972] Exit code: 1
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972] Stdout: ''
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972] Stderr: 'qemu-img: error while
> reading sector 131072: Invalid argument\n'
> 2013-03-19 13:31:53 23291 TRACE nova.compute.manager [instance:
> c75434ec-677f-4b9e-b5f8-8ab93bcdf972]
>
> I'd agree this looks like an image problem. You can see qemu crash
> here when running:
>
> qemu-img convert -O raw
> /var/lib/nova/instances/_base/2986816d8cbac0ea14d12b014f770563ab0a0517.part
> /var/lib/nova/instances/_base/2986816d8cbac0ea14d12b014f770563ab0a0517.converted
>
> I'm confused by the .part in the filename though... What version of
> nova are you running?
>
> Michael
>
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