HP 3PAR Operating System Software - Manual (Page 75)

When the setrcopygroup recover command is issued, SystemA comes back online and is
now the secondary-reverse system, receiving updates from SystemC in asynchronous periodic mode
(while SystemB is also receiving updates from SystemC), as shown in
Figure 28 (page 75) .
Figure 28 SystemA Becomes Secondary-Reverse System
When the setrcopygroup restore command is issued, SystemA again becomes the primary
system; it is resynchronized from SystemC to be up to date, and then synchronizes with SystemB
as usual. At this point, SystemB and SystemC become secondary systems, and the backup link
between SystemB and SystemC is no longer in operation because the system is running normally
(see
Figure 22 (page 71) ).
Failover and Failback Behavior of Individual Remote-Copy Groups in SLD Configuration 75