Re: [Qemu-devel] QCOW(2) image corruption under QEMU 0.9.0 reproducible

[Ben Taylor]

---- J M Cerqueira Esteves <address@hidden> wrote: 
> herbie hancock wrote:
> > Hello, i had also a reproducible disk crash:
> > info of the last good image, size is about 3,5GB
> > 
> > I never experienced such a bad problem with qemu before, maybe it is a 
> > problem with qcow2 format ?
> 
> After the problems with qcow2 images which I reported here a few weeks
> ago, I've only been using qcow images (under QEMU 0.9.0), without such
> surprises.  So it seems qemu has some bug related to qcow2 images,
> maybe manifesting itself only after they get larger than 4GB...

I suspect I saw problems with qcow2 images as well.  I was able to suspend
a Solaris Nevada B58 install and use savevm about 30% into the install and
restart it later.  As the image completd, the file system went all to hell
with corruption that was impossible to fix.  At the time, I attributed it to
the Solaris install (thinking it might have something to do with the
cmpxchg8b bug that was later fixed), but I suspect with the multiple
reports I've seen, I'm now thinking I saw the same thing.

I'm testing conversion of a qcow image to a qcow2 image.  We'll see how
that goes

Ben