VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Administering Cluster Functionality
Overview of Cluster Volume Management
Chapter 10346
See “Setting the Connectivity Policy on a Shared Disk Group” on
page 366 for information on how to use the vxedit command to set the
connectivity policy on a shared disk group.
Limitations of Shared Disk Groups
The cluster functionality of VxVM does not support RAID-5 volumes, or
task monitoring for cluster-shareable disk groups. These features can,
however, be used in private disk groups that are attached to specific
nodes of a cluster. Online relayout is supported provided that it does not
involve RAID-5 volumes.
The root disk group (rootdg) cannot be made cluster-shareable. It must
be private.
Only raw device access may be performed via the cluster functionality of
VxVM. It does not support shared access to file systems in shared
volumes unless the appropriate software is installed and configured.
If a shared disk group contains unsupported objects, deport it and then
re-import the disk group as private on one of the cluster nodes.
Reorganize the volumes into layouts that are supported for shared disk
groups, and then deport and reimport the disk group as shared.