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 4 163
# symcg -g cgoradb enable
4. Establish the BCV devices in the secondary Symmetrix as a mirror of
the standard device. From either node3 or node4, issue the following
commands:
# symmir -g dgoraA -full est
# symmir -g dgoraB -full est
Alternatively, from either node1 or node2, issue the following
commands:
# symmir -g dgoraA -full est -rdf
# symmir -g dgoraB -full est -rdf
Creating Volume Groups
The following procedures assume you are creating volume groups for a
cluster with a 2 by 2 Symmetrix configuration like that of Figure 4-19.
Use the following steps on node1:
1. Create the physical volumes:
# pvcreate -f /dev/rdsk/c6t0d0
# pvcreate -f /dev/rdsk/c6t0d1
# pvcreate -f /dev/rdsk/c5t0d2
# pvcreate -f /dev/rdsk/c5t0d3
2. Create the directories and special files for the volume groups.
# mkdir /dev/vgoraA
# mkdir /dev/vgoraB
# mknod /dev/vgoraA/group c 64 0x01000
# mknod /dev/vgoraB/group c 64 0x02000
3. Create the volume groups. Be careful not to span Symmetrix frames:
# vgcreate /dev/vgoraA /dev/rdsk/c6t0d0
# vgextend /dev/vgoraA /dev/rdsk/c6t0d1
# vgcreate /dev/vgoraB /dev/rdsk/c5t0d2
# vgextend /dev/vgoraB /dev/rdsk/c5t0d3