Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Purpose of a Remote Replication group

By creating a Remote Replication group, all replication virtual disk pairs in the group can be managed as one. For example, all replicated virtual disk pairs in a group can share the same data synchronization settings, primary and secondary roles, and write modes.

The following attributes also apply to a Remote Replication group:

The local storage array serves as the primary side of the Remote Replication group, while the remote storage array serves as the secondary side of the Remote Replication group.
At the virtual disk level, all virtual disks added to the Remote Replication group on the local storage array serve as the primary role in the Remote Replication configuration. Virtual disks added to the group on the remote storage array serve the secondary role.

Because applications may use more than one virtual disk, Remote Replication groups must be replicated as a pair. All members of the Remote Replication group are synchronized as a coordinated data set to provide consistent backup to the remote site.