[CentOS] CentOS 5.6 and KVM failure

Sat Apr 9 16:33:06 UTC 2011
Akemi Yagi <amyagi at gmail.com>

On Sat, Apr 9, 2011 at 9:21 AM, compdoc <compdoc at hotrodpc.com> wrote:
> After updating to 5.6 on a server this morning, I can no longer boot two
> virtual machines. One is trixbox which I believe is a 32bit centos based
> distro, and the other vm is a 64bit Windows 2008 installation.
> The error I get in the virt-manager console is FATAL: No bootable device.
> Both VMs are qcow2 format, and I've checked file permissions. I'm going to
> boot a live cd in the trixbox vm to see if I can access anything on it's
> qcow2 disk.
> Any hints appreciated...

A similar incident was reported during the QA. Look at the .xml file.
If it says type='raw', change it to type='qcow2' and restart libvirtd.
 Would that fix the problem ?