When going to the [Setting] tab in NuClient, a warning message pops up and describes that the system system detects an alien volume.
That volume must be from another Crystal and the current Crystal hasn't recognized this volume.
By choosing ''Repair'', the NVR will start the repairing process which may take a couple of hours.
If the option ''Repair'' is not available, it means there are some recording sequence number conflicts between Volumes. Please move all volumes back to the ''Available Disk Group Area'' and leave only the Volume you want to repair.
Please note that we don't recommend to combine volumes of two different Crystal into one, since there will be always recording sequence number conflicts. Once the desired footage is backuped, we recommend that you can format the alien volume to avoid recording sequence number conflicts.