Resource groups and device groups enable the Sun Cluster Geographic Edition software to manage data replication and takeover between clusters. You can also configure a protection group to replicate data from a primary cluster to a secondary cluster. For more information about configuring data replication, see the guide for the data replication product you are using:
The Sun Cluster Geographic Edition software extends Sun Cluster resource management features to integrate the data replication products. When you configure a protection group, the Sun Cluster Geographic Edition software creates replication resource groups for monitoring and controlling data replication.
A device group is a hardware resource that Sun Cluster manages. A device group is a type of global device that the Sun Cluster software uses to register volume manager disk groups. The Sun Cluster Geographic Edition software configures Sun Cluster device groups to include replication. For information about configuring device groups in Sun Cluster, see the guide for the data replication product you are using: