Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

To prevent a particular subdisk from being associated with a plex, set the putil0
field to a non-null string, as shown in the following command:
# vxedit -g mydg set putil0="DO-NOT-USE" mydg02-01
See the vxedit(1M) manual page.
Creating and administering subdisks
Changing subdisk attributes
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