Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Creating a Volume on Specific Disks

206 VERITAS Volume Manager Administrator’s Guide

For layered volumes, vxassist applies the same rules to allocate storage as for

non-layered volumes. For example, the following command creates a striped-mirror

volume with 2 columns:

# vxassist -b -g mydg -o ordered make strmirvol 10g \

layout=stripe-mirror ncol=2 mydg01 mydg02 mydg03 mydg04

This command mirrors column 1 across disks mydg01 and mydg03, and column 2 across

disks mydg02 and mydg04, as illustrated in “Example of Using Ordered Allocation to

Create a Striped-Mirror Volume.”

Example of Using Ordered Allocation to Create a Striped-Mirror Volume

Additionally, you can use the col_switch attribute to specify how to concatenate space

on the disks into columns. For example, the following command creates a mirrored-stripe

volume with 2 columns:

# vxassist -b -g mydg -o ordered make strmir2vol 10g \

layout=mirror-stripe ncol=2 col_switch=3g,2g \

mydg01 mydg02 mydg03 mydg04 mydg05 mydg06 mydg07 mydg08

This command allocates 3 gigabytes from mydg01 and 2 gigabytes from mydg02 to

column 1, and 3 gigabytes from mydg03 and 2 gigabytes from mydg04 to column 2. The

mirrors of these columns are then similarly formed from disks mydg05 through mydg08.

This arrangement is illustrated in “Example of Using Concatenated Disk Space to Create a

Mirrored-Stripe Volume” on page 207.

Mirror

Striped-Mirror Volume

Underlying Mirrored Volumes

Column 1

Column 2

mydg01-01

mydg03-01

mydg02-01

mydg04-01

Striped Plex