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10 PS Series Asynchronous Replication Best Practices and Sizing Guide | BP1012
2.4 Replication partnerships
With the exception of failback events, PS Series replication is always a one-way process, in which data
moves from the primary group volume to the secondary group replica set. Replication also allows for
reciprocal partners, which means that you can use two operational sites as recovery sites for each other.
Figure 2 shows examples of different replication partnership scenarios. To simplify the diagram, the fast
failback path is only shown in the basic partner path example within Figure 2 (fast failback works for all
replication paths).
Replication partnership paths