Overview of 3DC multi-target configuration

In the 3DC multi-target configuration, the data center is placed at the primary site and the two secondary sites. At least one storage system (VSP G800, VSP F800, VSP G1000, or HUS VM) is required at the primary site, intermediate site, and secondary site.

As shown in the following illustration, the P-VOL is paired with the TC S-VOL and the UR S-VOL at separate secondary sites. You can perform disaster recovery by using either the data synchronously copied with TC or the data asynchronously copied with UR. The TC site is at an intermediate distance, and the UR site is located at a greater distance. The following illustration shows this configuration. For details about setting up the 3DC multi-target configuration, see 3DC multi-target configuration.