This warning screen is presented when attempting to expand a volume that is currently being replicated to another Compellent Storage Center.
Expanding a volume that is the source of a replication will also cause the replication destination volume on the remote Compellent Storage Center to be expanded.
Depending on the speed of the link used for the replication and the QoS settings selected for the replication, the volume expansion may take longer than normal. Volume and replication IO will not be disrupted while the volume expansion completes.