VERITAS Volume Manager 4.1 Administrator's Guide

Administering Disks
Reserving Disks
Chapter 2 105
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 mydg03 is reserved, use the following command:
# vxassist make vol03 20m mydg03
The vxassist command overrides the reservation and creates a 20 megabyte volume on
mydg03. However, the command:
# vxassist make vol04 20m
does not use mydg03, 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 diskname
See the vxedit(1M) manpage for more information.