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.
exclusive=off instead means that more than one node in a cluster can open a volume simultaneously.