VERITAS Volume Manager 3.1 Reference Guide

Table Of Contents

Chapter 1 17

Volume Manager Commands

vxassist - creating and changing volumes

• System-wide defaults ﬁle—The system-wide defaults ﬁle contains

default values that you can alter. These values are used for tunables

that are not speciﬁed on the command line or in an alternate defaults

ﬁle.

• Alternate defaults ﬁle—A non-standard defaults ﬁle, speciﬁed with

the command vxassist -d

alt_defaults_file

• Command line—The tunable values speciﬁed on the command line

override any values speciﬁed internally or in defaults ﬁles.

Defaults File

The default behavior of vxassist is controlled by the tunables speciﬁed

in the /etc/default/vxassist ﬁle. The format of the defaults ﬁle is a

list of

attribute=value

pairs separated by new lines. These

attribute=value

pairs are the same as those speciﬁed as options on the

vxassist command line (refer to the vxassist(1M) manual page for

details).

Here is a sample vxassist defaults ﬁle:

# by default:

# create unmirrored, unstriped volumes

# allow allocations to span drives

# with RAID-5 create a log, with mirroring don’t create

a log

# align allocations on cylinder boundaries

layout=nomirror,nostripe,span,nocontig,raid5log,noregio

nlog,

diskalign

# use the fsgen usage type, except when creating RAID-5

volumes

usetype=fsgen

# allow only root access to a volume

mode=u=rw,g=,o=

user=root

group=root

# when mirroring, create two mirrors

nmirror=2