VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Specifying a Disk Group to Commands

108 VERITAS Volume Manager Administrator’s Guide

the free parameter. An example is shown in “Displaying Disk Group Information” on

page 109. One way to overcome the problem of running out of free space is to split the

affecteddiskgroupinto two separate diskgroups.See“Reorganizingthe Contents ofDisk

Groups” on page 121 for details.

Caution Before making any changes to disk groups, use the commands vxprint -hrm

and vxdisk list to record the current conﬁguration.

Specifying a Disk Group to Commands

Many VxVM commands allow you to specify a disk group using the –g option. For

example, to create a volume in disk group mktdg, use the following command:

# vxassist -g mktdg make mktvol 50m

The block special device for this volume is:

/dev/vx/dsk/mktdg/mktvol

The disk group does not have to be speciﬁed if the object names are unique. Most VxVM

commands use object names speciﬁed on the command line to determine the disk group

for the operation. For example, to create a volume on disk mktdg01 without specifying

the disk group name, use the following command:

# vxassist make mktvol 50m mktdg01

Many commands work this way as long as two disk groups do not have objects with the

same names. For example, VxVM allows you to create volumes named mktvol in both

rootdg and in mktdg. If you do this, you must add –g mktdg to any command where

you want to manipulate the volume in the mktdg disk group.

Note Most VxVM commands require superuser or equivalent privileges.