VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Administering Volumes

Performing Online Relayout

Chapter 8304

Performing Online Relayout

NOTE You may need an additional license to use this feature.

You can use the vxassist relayout command to reconﬁgure the layout of a

volume without taking it ofﬂine. The general form of this command is:

# vxassist [-b] [-g diskgroup] relayout volume

[layout=layout] \

[relayout_options]

NOTE If speciﬁed, the -b option makes relayout of the volume a background

task.

The following are valid destination layout conﬁgurations as determined

by the tables in “Permitted Relayout Transformations” on page 41:

concat-mirror—concatenated-mirror

concat or span, nostripe, nomirror—concatenated

raid5—RAID-5 (not supported for shared disk groups)

stripe—striped

stripe-mirror—striped-mirror

For example, the following command changes a concatenated volume to a

striped volume with the default number of columns, 2, and stripe unit

size, 64k:

# vxassist relayout vol02 layout=stripe

On occasions, it may be necessary to perform a relayout on a plex rather

than on a volume. See “Specifying a Plex for Relayout” on page 305 for

more information.