VERITAS Volume Manager 3.1 Administrator's Guide

Volume Tasks

Creating Subdisks

Chapter 6 275

Creating Subdisks

You can use the vxmake command to create Volume Manager objects,

such as subdisks. To create a subdisk, specify the following criteria:

name of the subdisk

• length of the subdisk

• starting point (offset) of the subdisk within the disk

• disk media name

To create a subdisk, use the following command:

# vxmake sd

subdisk_name disk

offset

len

For example, to create a subdisk named disk02-01 that starts at the

beginning of disk disk02 and has a length of 8000 sectors, use the

following command:

# vxmake sd disk02-01 disk02,0,8000

By default, Volume Manager commands take sizes in sectors. Adding a

sufﬁx (such as k, m, or g) changes the unit of size.

If you intend to use the new subdisk to build a volume, you must

associate the subdisk with a plex (see “Associating Subdisks”). Subdisks

for all plex layouts (concatenated, striped, RAID-5) are created the same

way.