HP 3PAR Operating System Software - Manual (Page 140)

Failing Over to the Synchronous Backup System
If the primary system fails or is taken offline, you can failover the storage system to the synchronous
backup system if this system:
•
is still functioning properly
•
is not affected by the situation that took the primary system offline (in other words, is not in
danger of failing as well)
When the synchronous backup system becomes the failover system, the synchronous backup system
temporarily assumes the role of the primary system.
Figure 28 Failing Over to the Synchronous Backup System
140 Disaster Recovery for Synchronous Long Distance