Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

Specifies the number of columns.ncol=number
Specifies the number of columns to add.ncol=+number
Specifies the number of columns to remove.ncol=-number
Specifies the stripe width.stripeunit=size
The following examples use vxassist to change the stripe width and number of
columns for a striped volume in the disk group dbasedg:
# vxassist -g dbasedg relayout vol03 stripeunit=64k ncol=6
# vxassist -g dbasedg relayout vol03 ncol=+2
# vxassist -g dbasedg relayout vol03 stripeunit=128k
The following example changes a concatenated volume to a RAID-5 volume with
four columns:
# vxassist -g dbasedg relayout vol04 layout=raid5 ncol=4
Specifying a plex for relayout
If you have enough disks and space in the disk group, you can change any layout
to RAID-5 . To convert a mirrored volume to RAID-5, you must specify which plex
is to be converted. When the conversion finishes, all other plexes are removed,
releasing their space for other purposes. If you convert a mirrored volume to a
layout other than RAID-5, the unconverted plexes are not removed. Specify the
plex to be converted by naming it in place of a volume as follows:
# vxassist [-g diskgroup] relayout plex [layout=layout] \
[relayout_options]
Tagging a relayout operation
To control the progress of a relayout operation, for example to pause or reverse
it, use the -t option to vxassist to specify a task tag for the operation. For
example, the following relayout is performed as a background task and has the
tag myconv:
# vxassist -b -g dbasedg -t myconv relayout vol04 layout=raid5 \
ncol=4
See “Viewing the status of a relayout” on page 380.
See “Controlling the progress of a relayout” on page 380.
379Administering volumes
Performing online relayout