When a storage disk with backup data from one appliance is added to another appliance mount issues occur when required permissions do not exist
When initiating a stateless recovery for your Xen UB, the new Xen UB recovery target shows mount errors in the UI when trying to add the virtual disk of the recovery source Xen UB.
While attaching storage that contains backups from another appliance through the hypervisor
1. Detach the virtual disk to be used for stateless recovery from the recovery source Xen UB
2. Verify the virtual disk being used for stateless recovery is set to "Read/Write" mode.