HP 3PAR Operating System Software - Manual (Page 71)

Failover and Failback Behavior of Individual Remote-Copy Groups in SLD
Configuration
Individual remote-copy groups can be failed over without forcing a full array failover.
Failover of individual remote-copy groups is illustrated in the following sections.
Normal SLD Operation
During normal SLD operation, there is a synchronous link between SystemA and SystemB, an
asynchronous periodic link between SystemA and SystemC, and a backup asynchronous periodic
link between SystemB and SystemC, as shown in
Figure 22 (page 71) .
Figure 22 SLD Remote-Copy Configuration, Normal Operation
SystemA-to-SystemB Failover for an Individual Remote-Copy Group
When an individual remote-copy group on SystemA fails, other remote-copy volume groups continue
to be synchronized normally, as shown in
Figure 23 (page 72) .
Failover and Failback Behavior of Individual Remote-Copy Groups in SLD Configuration 71