[ovirt-users] Ovirt VM started with the most recent snapshot with the current disk missing

Dear Ovirt folks, I am faced with a very strange situation with Ovirt 4.3. A virtual machine has two snapshots and a working disk, with the former two snapshots being read only and the working one read-write. After an unplanned power outage, a virtual machine can only be started with the recent snapshot, and the actual working disk is missing in the Ovirt UI. I can see the disk still exists in the backend storage, but it seems not Ovirt does not know it. Thus the VM lose the recent data on the missing disk. Does any one know whether this is a known bug in Ovirt 4.3, or is there a method to resotre the missing working disk back to the virtuanl machine? Otherwise i am faced with a terrible data loss issue on Ovirt best regards, Samuel