The shared disk DR resource manages data copying between the shared volume and the remote server.
 replicate a shared disk volume of a cluster to an offsite node of disaster recovery purpose.

The shared disk DR resource is composed of three servers nodes that manage the shared volume. MCCS is only operable at the server that composes the shared volume.
In other words, MCCS does not operate at the remote server. MCCS is not involved with operation of the remote serveroffsite node, so, administrators need to perform manual operation or register necessary actions for processing in advance.

Data is copied replicated from the server with the source volume -primary node to the server with the target volume. Now, the other source server offsite target node and the source-secondary node that cannot access the shared volume recognizes the shared volume as the one having the "NONE" role.
Thus, the offsite target volume node and the "NONE" volume node are locked and you cannot write or read to and from them. The goal is to prohibit the use of the corresponding disk volume of the node so that the data integrity can be guaranteed.