Hi, We're running oVirt 4.3.8 and we recently had a oVirt crash after moving too much disks between storage domains. Concretely, one of the Storage Domains reports status "Unknown", "Total/Free/Guaranteed free spaces" are "[N/A]". After trying to activate it in the Domain Center we see messages like these from all of the hosts: VDSM hostX command GetVGInfoVDS failed: Volume Group does not exist: (u'vg_uuid: Usi3y8-S4eq-EXtl-FA58-MA3K-b4vE-4d9SCp',) I tried putting the Storage Domain in maintenance and it fails with messages like: Storage Domain iaasb13 (Data Center KVMRojo) was deactivated by system because it's not visible by any of the hosts. Failed to update OVF disks 8661acd1-d1c4-44a0-a4d4-ddee834844e9, OVF data isn't updated on those OVF stores (Data Center KVMRojo, Storage Domain iaasb13). Failed to update VMs/Templates OVF data for Storage Domain iaasb13 in Data Center KVMRojo. I'm sure the storage domain backend is up and running, and the LUN being exported. Any hints how can I debug this problem and restore the Storage Domain? Thanks.