A Multi-Target Mirror environment allows a device to be the primary of more than one PPRC pair. It simplifies recovery scenarios for cascaded configurations, when swapping from the local site to the intermediate site. With Multi-Target support, during a failover to the intermediate site, the intermediate device can become a primary to both the local and the remote, eliminating the need to suspend the intermediate to remote site pair when swapping back to the local site. It provides for the capability of an incremental resynchronization between the two secondary volumes in both planned and unplanned swap scenarios.
