ref #11256
Part 1. zone ID of a device:
a.) A vdc device is registered on vdsm. It has an entry in the vdsm database. -> the zoneID is written from vdsm to vdc device. b.) A vdc device is registered on vdsm. It does not have an entry in the vdsm database. -> the zone ID is read back from the vdc device. -> if the zone ID is valid, it will be stored in the vdsm database. -> if the zone ID is invalid, a default zone ID is created and stored in the vdsm database. The zone ID is written back to the device.