Managing Serviceguard Fifteenth Edition, reprinted May 2008

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5 231
where the /dev/volume-group is the name of the second volume group
and block-special-file is the physical volume name of a lock disk in
the chosen volume group. These lines should be added for each node; for
example:
SECOND_CLUSTER_LOCK_VG /dev/vglock
SECOND_CLUSTER_LOCK_PV /dev/dsk/c4t0d0
or (using agile addressing; see “About Device File Names (Device Special
Files)” on page 112):
SECOND_CLUSTER_LOCK_VG /dev/vglock
SECOND_CLUSTER_LOCK_PV /dev/disk/disk100
See also “Choosing Cluster Lock Disks” on page 210.
Specifying a Lock LUN
A cluster lock disk, lock LUN, or quorum server, is required for two-node
clusters. The lock must be accessible to all nodes and must be powered
separately from the nodes. See also “Cluster Lock” on page 68; and see
“Setting Up a Lock LUN” on page 211 for configuration information and
restrictions.
To specify a lock LUN in the cluster configuration file, enter the lock
LUN information following each node name, for example:
NODE_NAME hasupt21
NETWORK_INTERFACE lan1
HEARTBEAT_IP 15.13.173.189
NETWORK_INTERFACE lan2
NETWORK_INTERFACE lan3
CLUSTER_LOCK_LUN /dev/dsk/c0t1d1