Managing Serviceguard Sixteenth Edition, March 2009

that this disk meets your power wiring requirements. If necessary, choose a disk

To display the failover times of disks, use the cmquerycl command, specifying all the

nodes in the cluster. The output of the command lists the disks connected to each node

together with the re-formation time associated with each.

Do not include the node’s entire domain name; for example, specify ftsys9, not

ftsys9.cup.hp.com:

cmquerycl -v -n ftsys9 -n ftsys10

cmquerycl will not print out the re-formation time for a volume group that currently

belongs to a cluster. If you want cmquerycl to print the re-formation time for a volume

group, run vgchange -c n <vg name> to clear the cluster ID from the volume

group. After you are done, do not forget to run vgchange -c y vgname to rewrite

the cluster ID back to the volume group; for example:

vgchange -c y /dev/vglock

NOTE: You should not configure a second lock volume group or physical volume

unless your configuration specifically requires it. See “Dual Lock Disk” (page 64).

If your configuration requires you to configure a second cluster lock, enter the following

parameters in the cluster configuration file:

SECOND_CLUSTER_LOCK_VG /dev/volume-group

SECOND_CLUSTER_LOCK_PV /dev/dsk/block-special-file

where 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)”

(page 107)):

SECOND_CLUSTER_LOCK_VG /dev/vglock

SECOND_CLUSTER_LOCK_PV /dev/disk/disk100

See also “Choosing Cluster Lock Disks” (page 202).

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 ” (page 62); and see “Setting Up a Lock LUN” (page 202) 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:

Configuring the Cluster 219