Operating System Software User Manual
Figure 45 HP 3PAR Peer Persistence—Working Principle
To summarize the switchover:
• Synchronous remote-copy volumes are created on source and target arrays using the same
WWN addresses.
• The source and target volumes are exported to the same host set from both arrays using
different target port groups supported by persona 11 (VMware).
• Using ALUA, paths to the source volumes are presented as active, and paths to target volumes
are presented as standby.
• The HP 3PAR Quorum Witness—which must be on a third site—is configured and connected
to both arrays by using a non-remote-copy link.
Manual Transparent Switchover
A manual transparent switchover is initiated by issuing the setrcopygroup switchover
command on a remote-copy group-by-group basis on the current primary storage system. The
following sequence of actions is executed as part of the switchover operation (see Figure 46 (page
138)):
1. The source array target port group is changed to transition state.
2. The source array sends a remote failover request to the secondary array.
3. The target array target port group is changed to transition state.
4. The target array takes a recovery point snapshot.
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