HP 3PAR Operating System Software - Manual (Page 182)

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This relationship between target definitions and Remote Copy system pairs is true for all valid
Remote Copy configurations (unidirectional, bidirectional, N-to-1, 1-to-N, and synchronous
long distance).
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For the system that contains the primary volume groups (the primary system), the target system
is the same as the backup system. For the system that contains the secondary volume groups
(the backup system), the target system is the same as the primary system.
Figure 31 (page 182) illustrates target definitions in an example bidirectional Remote Copy pair.
Figure 31 Target Definitions (One Bidirectional Remote Copy Pair)
In Figure 31 (page 182) , the target definitions for each volume group on each system are:
Target Definition/Target System Volume Group and Location
System2 For volume group X on System1
System1 For secondary volume group X.r11 on System2
System1 For volume group Y on System2
System2 For secondary volume group Y.r96 on System1
Additional Information:
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“Setting Up a Unidirectional Configuration” (page 67)
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“Setting Up a Bidirectional Configuration” (page 76)
Remote Copy Target System
Because the primary and backup roles can change, Remote Copy uses the term Remote Copy
target system to refer to the other storage system in a Remote Copy pair.
For example, in a Remote Copy pair composed of System1 and System2, the target system for
System1 is System2, and the target system for System2 is System1.
System Roles and Direction of Data Flow
Under normal operating conditions, the natural direction of data flow is from the primary system
to the backup system.
182 Remote Copy Pairs and Targets