VERITAS Volume Manager 4.1 Administrator's Guide

Creating Volumes
Creating a Striped Volume
Chapter 7248
To change the default number of columns from 2, or the stripe width
from 64 kilobytes, use the ncolumn and stripeunit modifiers with
vxassist. For example, the following command creates a striped volume
with 5 columns and a 32-kilobyte stripe size:
# vxassist -b make stripevol 30g layout=stripe
stripeunit=32k \
ncol=5
Creating a Mirrored-Stripe Volume
A mirrored-stripe volume mirrors several striped data plexes.
NOTE A mirrored-stripe volume requires space to be available on at least as
many disks in the disk group as the number of mirrors multiplied by the
number of columns in the volume.
To create a striped-mirror volume, use the following command:
# vxassist [-b] [-g diskgroup] make volume length
layout=mirror-stripe [nmirror=number_mirrors]
[ncol=number_columns] [stripewidth=size]
NOTE Specify the -b option if you want to make the volume immediately
available for use. See “Initializing and Starting a Volume” on page 258
for details.
Alternatively, first create a striped volume, and then mirror it as
described in “Adding a Mirror to a Volume” on page 273. In this case, the
additional data plexes may be either striped or concatenated.
Creating a Striped-Mirror Volume
A striped-mirror volume is an example of a layered volume which stripes
several underlying mirror volumes.