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

# vxassist [-g diskgroup] [-f] remove mirror volume \
[nmirrors=number] [attributes...]
By default, one mirror is removed. You can use the nmirrors attribute to specify
the number of mirrors to remove. You can use storage attributes to specify the
storage to be removed.
For example, the following command removes the mirror on the disk mydg01, from
the volume mirvol1:
# vxassist -g mydg remove mirror mirvol1 \
remove_storage=’"DM"="mydg01"’
If you use the vxassist command to remove mirrors, 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
mirrors of a particular kind.
Adding columns to a volume
To add columns to a striped or RAID-5 volume, use the following command:
# vxassist [-g diskgroup] [-b] add column volume ncols=number \
[tmplen=length] [attributes...]
The ncols attribute specifies the number of columns to add. You can use storage
attributes to specify the storage to be used for the columns. If specified, the -b
option adds 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 adds a column to the volume, strpvol1,
using disk enc1_5:
# vxassist -g mydg -b add column strpvol1 ncols=1 \
use_storage=’"DeviceName"="enc1_5"’
If an HFS or Base JFS (Lite VxFS) file system is configured on an ISP volume, do
not specify layout=grow to the vxvoladm command when adding columns to the
volume unless you first unmount the file system. These file system types can only
be grown if they are first unmounted. This restriction does not apply to an Online
87Administering application volumes
Adding columns to a volume