HP 3PAR Operating System Software - Manual (Page 113)

Natural Direction of Replication
The natural direction of remote-copy replication is from the primary volume group to the secondary
volume group (from the primary system to the backup system).
Linking Virtual Volumes in Volume Groups
As long as a secondary virtual volume is the same size as the primary volume, you can map any
primary virtual volume to any secondary volume in the secondary volume group.
Unidirectional Volume Groups
In unidirectional remote-copy pairs, when you add virtual volumes to volume groups (using the
admitrcopyvv
command), you map each virtual volume in the primary volume group on the
primary system to a virtual volume in the corresponding secondary volume group on the backup
system (
Figure 34 (page 113) ).
Figure 34 Volume Mapping between Unidirectional Primary and Backup Systems
Bidirectional Volume Groups
In bidirectional remote-copy pairs, you can add primary volume groups to both the primary and
backup systems. HP 3PAR Remote Copy automatically creates secondary volume groups on the
other system in the remote-copy pair.
In this configuration, each system provides backup for the primary volume groups on the other
system (
Figure 35 (page 114) ).
Natural Direction of Replication 113