[Bug 574665] Re: kvm + virtio disk corrupts large volumes (>1TB).

[Dan Bonelli]

I'm experiencing a similar issue, albeit with slightly different
hardware.  I have several VMs backed by SAN storage, accessed through a
QLogic 2560 controller.  All of my volumes that are <1TB seem to
function without issue.  On the larger volumes (one in particular is
>7TB with an XFS filesystem), I get near constant corruption whenever I
copy a large volume of data (50-100GB).  I switched the VM guest to use
IDE instead of virtio, and the corruption was less frequent but didn't
disappear altogether.

I've mounted the SAN volumes on the host and done 100GB+ copies without
going through KVM and they worked flawlessly, so I can rule out the SAN
setup as being problematic.

-- 
kvm + virtio disk corrupts large volumes (>1TB).
https://bugs.launchpad.net/bugs/574665
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