I have same problem too. I have one node as ovirt engine and as hypervisor too. I successfully upgrade our engine from 3.1 to 3.2 and then from 3.2 to 3.3 and everything is ok.
then i upgrade our cluster version to 3.3 and then our datacenter to 3.3.
I increase 1GB on virtual machine with 20GB thin disk and I receive success message on event and our disk increase to 21GB but after host reboot, i saw message that contains no bootable disk is available!!!
then i try to install new os on that disk (Centos 6.4 minimal) and anaconda show the error on screen : No usable disks have found. I think disk corrupt after resizing.
it was test VM but it's very if occur for real and functional VMs.

On10/01/2013 10:49 PM, Federico Simoncelli wrote:

Hi Martijn,
 can you post somewhere the relevant vdsm logs (from the spm host)?

Thanks,