User decommissioned the old NAS storing the old vdisks physically instead of removing it from PVS console. After this change, any operation related with vdisk on the PVS console returned with error "The snap-in is not responding, end now or cancel to return to the MMC to check the status of the snap-in."

Since the old storage has been physically removed, the old vdisk information is still left over in PVS DB.
PVS console works normally after the deletion of orphan DB entry for old storage under "dbo.Store" in PVS DB.

Problem Cause

The issue is caused by physical removal of old storage.