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

Chapter 8, Administering Volumes
Performing Online Relayout
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Specifying a Non-Default Layout
You can specify one or more relayout options to change the default layout configuration.
Examples of these options are:
ncol=number specifies the number of columns
ncol=+number specifies the number of columns to add
ncol=-number specifies the number of colums to remove
stripeunit=size specifies the stripe width
See the vxassist(1M) manual page for more information about relayout options.
The following are some examples of using vxassist to change the stripe width and number
of columns for a striped volume in the disk group dbaseg:
# vxassist -g dbaseg relayout vol03 stripeunit=64k ncol=6
# vxassist -g dbaseg relayout vol03 ncol=+2
# vxassist -g dbaseg relayout vol03 stripeunit=128k
The next example changes a concatenated volume to a RAID-5 volume with four columns:
# vxassist -g fsgrp relayout vol04 layout=raid5 ncol=4
Supported Relayout Transformations for Unmirrored Stripe, and Layered Striped-Mirror Volumes
Relayout to From stripe, or stripe-mirror
concat Yes.
concat-mirror Yes.
mirror-concat No. Use vxassist convert after relayout to concatenated-mirror volume
instead.
mirror-stripe No. Use vxassist convert after relayout to striped-mirror volume instead.
raid5 Yes. The stripe width and number of columns may be changed.
stripe Yes. The stripe width or number of columns must be changed.
stripe-mirror Yes. The stripe width or number of columns must be changed.