Veritas Storage Foundation Intelligent Storage Provisioning 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

76 Administering application volumes

Resizing volumes online

Increasing or decreasing the size of a volume is an operation that can be

performed while a volume is online. The following

vxassist operations are

available for resizing a volume:

■ growto — Increase volume size to a specified length.

■ growby — Increase volume size by a specified length.

■ shrinkto — Reduce volume size to a specified length.

■ shrinkby — Reduce volume size by a specified length.

You can specify the length argument in sectors, kilobytes, megabytes, gigabytes

or as a percentage by adding the unit of measure as a suffix (s, m, k, g, t, p, e or %)

to the length value. If no unit is specified, sectors are assumed.

If the volume that is being resized has any linked mirror volumes, these mirror

volumes are also resized in the same operation. However, any full-sized

snapshots that have been broken-off are not resized, and new snapshots must be

created. Space-optimized instant snapshots are not affected as they are not full-

sized versions of their parent volumes.

See “Administering instant snapshots” on page 93.

Warning: If you use vxassist to resize a volume, do not shrink it below the size

of the file system that is located on it. If you do not shrink the file system first,

you risk unrecoverable data loss. If you have a VxFS file system, shrink the file

system first, and then shrink the volume. Other file systems may require you to

back up your data so that you can later recreate the file system and restore its

data. Alternatively, you can use the

vxresize command to resize both the

volume and its file system where this is supported. See the

vxresize(1M)

manual page for more information.

Note: If you use the vxassist command to resize application volumes of type

fsgen or raid5, you must specify the

-f (force) option to the command. You

must also specify the -f option if growing a volume would violate any rules.