All shared volumes, including those with exclusive open access, can only be created on the master node.
When using the
vxassist command to create a volume, you can use the
exclusive=on attribute to specify that the volume may only be opened by one node in the cluster at a time. For example, to create the mirrored volume
volmir 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.
exclusive=off instead means that more than one node in a cluster can open a volume simultaneously.