Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Metropolitan Cluster Using MetroCluster/SRDF
Setting up M by N Configurations
Chapter 4158
Setting up M by N Configurations
Metropolitan clusters using EMC/SRDF can be built in configurations
that use more than two EMC Symmetrix disk arrays. In such
configurations, M arrays located in Data Center A may be connected to N
arrays located in Data Center B. This section describes how to set up this
configuration using SymCLI and HP-UX commands. It is assumed that
you have already set up the Symmetrix CLI database on each node as
described in the previous section, “Preparing a Cluster for
MetroCluster/SRDF.” It is also assumed that Symmetrix PowerPath
software is installed on all nodes.
WARNING M by N configurations cannot be used with R1/R2 swapping.