VERITAS Volume Manager 4.1 Administrator's Guide

Creating Volumes

Using vxassist

Chapter 7232

NOTE You must create the /etc/default directory and the vxassist default ﬁle if

these do not already exist on your system.

The format of entries in a 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.

To display the default attributes held in the ﬁle /etc/default/vxassist, use

the following form of the vxassist command:

# vxassist help showattrs

The following 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,noregionlog, 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

# for regular striping, by default create between 2 and 8 stripe

# columns

max_nstripe=8

min_nstripe=2

# for RAID-5, by default create between 3 and 8 stripe columns

max_nraid5stripe=8

min_nraid5stripe=3

# by default, create 1 log copy for both mirroring and RAID-5 volumes

nregionlog=1