VERITAS Volume Manager 3.5 Installation Guide (August 2002)

Chapter 4, Upgrading the VERITAS Volume Manager
Upgrading Disk Group Versions
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If a disk group version is not specified using the -T option, this command upgrades the
disk group to the highest version supported by the VxVM version on your system.
For shared disk groups, the latest disk group version is only supported by the latest
cluster protocol version. See “Upgrading Cluster Functionality” in the Volume Manager
Administrators Guide for more information on changing the cluster protocol version.