Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

JFS (Full VxFS) file system, which can be grown while mounted. See the

vxresize(1M) manual page for more information.

Removing columns from a volume

To remove columns from a striped or RAID-5 volume, use the following command:

# vxassist [-g diskgroup] [-b] [-f] remove column volume \

[ncols=number] [tmplen=length]

The ncols attribute specifies the number of columns to remove. If specified, the

-b option removes the columns in the background.

This operation creates a temporary 2-way mirror volume that requires at least

two disks, and therefore twice as much disk space as the size of the temporary

volume. The size of the temporary volume is based on the size of the volume that

is being changed. If required, you can use the tmplen attribute to specify the size

of the temporary volume.

For example, the following command removes a column from the volume,

strpvol1:

# vxassist -g mydg -b remove column strpvol1 ncols=1

If you use the vxvoladm command to remove columns, you must specify the -f

(force) option to the command if the operation would violate any rules. For

example, the rules may imply that a volume must have minimum number of

columns of a particular kind.

If an HFS or Base JFS (Lite VxFS) file system is configured on an ISP volume, do

not specify layout=shrink to the vxvoladm command when removing columns

from the volume. These file system types cannot be shrunk. This restriction does

not apply to an Online JFS (Full VxFS) file system, which can be shrunk while

mounted. See the vxresize(1M) manual page for more information.

Changing the stripe unit size of volumes

To change the stripe unit size of a striped or RAID-5 volume, use the following

command:

# vxassist [-g diskgroup] [-b] setstwidth volume \

stripeunit=size [tmplen=length] [attributes...]

If specified, the -b option changes the stripe width in the background.

Administering application volumes

Removing columns from a volume