Sharing volumes with TrueCopy

Like UR, the TrueCopy (TC) remote replication function provides copies of production volumes in a second location. However, unlike UR, the TC S-VOLs are synchronous copies of the P-VOLs, and the secondary storage system is located in the same general region as the primary storage system. Creating a UR backup and a TC backup ensures that a copy in a third location is available in the event that both the primary and secondary sites fail. The TC secondary sites must be closer than the UR secondary sites because TC sites are affected by long distance more than UR sites.

You can combine UR and TC operations in a variety of ways and be prepared in case of failure or disaster. For the configuration combining UR and TC, there are three 3-data-center (3DC) configurations.

 You can combine UR and TC using the following storage system models: VSP G800, VSP F800, VSP G1000, and HUS VM (3DC multi-target only).