Ensure that you have completed the following prerequisite tasks before you use this wizard:
A replicated mirror group is a logical collection of disks or volumes that are replicated by the underlying storage technology to another site. PowerHA SystemMirror treats the mirror group as a single unit for replication management, disaster recovery, and high availability.
PowerHA SystemMirror treats the disks that form a replicated mirror group as a single unit for replication. This ensures that PowerHA SystemMirror can replicate all the disks or volumes to a geographically distant site in a consistent manner. When the application fails over to the secondary site, it can continue to run with either no recovery or minimal recovery.
Storage products that PowerHA SystemMirror Enterprise Edition supports, such as EMC Symmetrix, Hitachi Universal Replicator (UR), IBM® XIV®, and IBM DS8000® series, provide a similar grouping construct at their level. For such storage systems, PowerHA SystemMirror maps the mirror groups in a one-to-one relationship with the underlying storage groups.
The following storage technologies provide the required logical grouping at the storage level to support replicated mirror groups:
For more
information about replicated mirroring, see the Storage-based high availability and disaster recovery
for PowerHA SystemMirror Enterprise Edition topic in the AIX Information Center.