Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Chapter 5, Creating and Administering Subdisks
Removing Subdisks
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removing the subdisk makes the volume unusable, because another subdisk in
the same stripe is unusable or missing and the volume is not DISABLED and
empty, the operation is not allowed.
Removing Subdisks
To remove a subdisk, use the following command:
# vxedit [-g diskgroup] rm subdisk
For example, to remove a subdisk named mydg02-01 from the disk group, mydg, use the
following command:
# vxedit -g mydg rm mydg02-01