[Users] Unable to install Windows 7 with thin provisioned disks

I am unable to get an install of Windows 7 to start when using thin provisioned disks. If I use preallocated disks everything is fine. What I got is that when the VM is booting up it paused with error message "VM is paused due to i/O problems with storage domain" In the vdsm.log I got following Thread-3449::DEBUG::2012-05-25 10:41:00,139::libvirtvm::240::vm.Vm::(_getDiskStats) vmId=`e36b1add-acf2-4c8c-8f7b-a7fe4436b115`::Disk hda stats not available Thread-3449::DEBUG::2012-05-25 10:41:00,140::libvirtvm::269::vm.Vm::(_getDiskLatency) vmId=`e36b1add-acf2-4c8c-8f7b-a7fe4436b115`::Disk hda latency not available Any clue? Ricky Schneberger