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

Figure 49 Role Reversal Begins
To complete role reversal, the following actions occur (see Figure 50 (page 140) ):
1. When the primary-reversed and secondary-reversed volumes are back in sync, the snapshots
that were taken on both sides get removed.
2. The remote-copy groups then undergo a reverse (natural) operation.
3. This reverse request updates the remote-copy request to change the primary-reversed group
to a primary group. The secondary-reversed group becomes a target.
Figure 50 Role Reversal Is Complete
140 HP 3PAR Peer Persistence with Transparent Failover