Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Administering VxVM in Cluster Environments
378 VERITAS Volume Manager Administrator’s Guide
Setting Exclusive Open Access to a Volume by a Node
Note 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.
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: 60
hostid: giga
entries:
You can also check the existing cluster protocol version using the following command:
# vxdctl protocolversion
This produces output similar to the following:
Cluster running at protocol 60