Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

in the disk group dskgrp, and configure it for exclusive open, use the following
command:
# vxassist -g dskgrp make volmir 5g layout=mirror exclusive=on
Multiple opens by the same node are also supported. Any attempts by other nodes
to open the volume fail until the final close of the volume by the node that opened
it.
Specifying exclusive=off instead means that more than one node in a cluster
can open a volume simultaneously. This is the default behavior.
Setting exclusive open access to a volume by a node
Exclusive open access on a volume can only be set on the master node. Ensure
that none of the nodes in the cluster have the volume open when setting this
attribute.
You can set the exclusive=on attribute with the vxvol command to specify that
an existing volume may only be opened by one node in the cluster at a time.
For example, to set exclusive open on the volume volmir in the disk group dskgrp,
use the following command:
# vxvol -g dskgrp set exclusive=on volmir
Multiple opens by the same node are also supported. Any attempts by other nodes
to open the volume fail until the final close of the volume by the node that opened
it.
Specifying exclusive=off instead means that more than one node in a cluster
can open a volume simultaneously. This is the default behavior.
Displaying the cluster protocol version
The following command displays the cluster protocol version running on a node:
# vxdctl list
This command produces output similar to the following:
Volboot file
version: 3/1
seqno: 0.19
cluster protocol version: 80
hostid: giga
entries:
483Administering cluster functionality
Administering VxVM in cluster environments