Cluster Server 8.0 Agent for EMC SRDF/Star Configuration Guide - Windows

Workload and sync target total site failure

In this scenario, the hosts and storage at both the workload site and the sync target site become unavailable. Under these conditions, you must use VCS to bring the application online at the async target site.

At this point, no synchronous replication link is available.

After both the workload site and sync target sites are available, you can regain Star protection by using VCS to perform a manual switch back to the workload site.