HP 3PAR Remote Copy Software - Manual (Page 21)

2.5 Remote Copy Terms and Concepts
InForm OS Version 2.3.1 Remote Copy User’s Guide
Figure 2-1. Relationship of Primary Versus Secondary Volume Groups on Primary and Backup Storage
Servers
In Figure 2-1 , InServ1 and InServ2 act as both primary and backup servers. The following
relationships are established:
■ Volume Group X (the primary volume group on storage server InServ1) is copied to
storage server InServ2 and exists there as the secondary volume group Volume Group
X.r. InServ2 acts as a backup server to InServ1 (the primary server).
■ Volume Group Y (the primary volume group on storage server InServ2) is copied to
storage server InServ1 and exists there as the secondary volume group Volume Group Y.r.
InServ1 acts as a backup server to InServ2 (the primary server).
■ In Remote Copy, the storage server on which you initially created a volume group is
identified as the local or primary server. The natural direction of data replication (the copy)
originates from that server. In the previous figure, Remote Copy was set up on InServ1.
Therefore the natural direction of the copy is from InServ1 to InServ2 for Volume
Group X.
Primary
Volume
Group X
Secondary
Volume
Group Y.r
Secondary
Volume
Group X.r
Primary
Volume
Group Y
Group X to Group X.r
Group Y to Group Y.r
InServ1
InServ2
Natural direction
of data replication