HP 3PAR Operating System Software - Manual (Page 200)

6. saves the newer snapshot for a future resynchronization
CAUTION: Because Remote Copy uses multiple snapshots during resynchronization, you
must ensure that the space available to virtual volumes is adequate. For more information, see
“Virtual Volumes and CPGs” (page 187) .
Figure 40 Fast Resynchronization Using Resynchronization Snapshots
200 Synchronization Types and Limits