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

Cascading Failover in a Continental Cluster
Data Replication Procedures
Chapter 8 389
From a host that connects to the secondary Symmetrix:
# symmir -g <secisymdevgrpname> split
2. Incrementally establish the SRDF volume pairs between the primary
Symmetrix and the secondary Symmetrix. From a host that connects
to the primary Symmetrix:
# symrdf -g <prisymdevgrpname> est
From a host that connects to the secondary Symmetrix:
# symrdf -g <secsymdevgrpname> est
3. Use the following command to check the state of the SRDF link from
the R1 devices in the primary Symmetrix to the R2 devices in the
secondary Symmetrix. Make sure that the state is “Synchronized”
before proceeding to the next step. From a host that connects to the
primary Symmetrix:
# symrdf -g <prisymdevgrpname> query
From a host that connects to the secondary Symmetrix:
# symrdf -g <secsymdevgrpname> query
4. Re-establish the BCV/R1 devices in the secondary Symmetrix as as a
mirror of the standard device. From a host that connects to the
primary Symmetrix:
# symmir -g <prisymdevgrpname> est -rdf
From a host that connects to the secondary Symmetrix:
# symmir -g <secsymdevgrpname> est