VERITAS Volume Manager 3.1 Administrator's Guide

Disk Tasks
Reserving Disks
Chapter 4 201
Reserving Disks
By default, the vxassist command allocates space from any disk that
has free space. You can reserve a set of disks for special purposes, such as
to avoid general use of a particularly slow or a particularly fast disk.
To reserve a disk for special purposes, use the following command:
# vxedit set reserve=on diskname
After you enter this command, the vxassist program does not allocate
space from the selected disk unless that disk is specifically mentioned on
the vxassist command line. For example, if disk03 is reserved, use the
following command:
# vxassist make vol03 20m disk03
The vxassist command overrides the reservation and creates a 20
megabyte volume on disk03. However, the command:
# vxassist make vol04 20m
does not use disk03, even if there is no free space on any other disk.
To turn off reservation of a disk, use the following command:
# vxedit set reserve=off
disk_name
See vxedit (1M) Special Attribute Values for Disk Media.