Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

284 Administering volumes
Performing online relayout
To list all volumes on which Non-Persistent FastResync is enabled, use the following
command:
# vxprint [-g diskgroup] -F “%name” \
-e “v_fastresync=on && !v_hasdcolog”
To list all volumes on which Persistent FastResync is enabled, use the following
command:
# vxprint [-g diskgroup] -F “%name” -e “v_fastresync=on \
&& v_hasdcolog”
Disabling FastResync
Use the vxvol command to turn off Persistent or Non-Persistent FastResync for an
existing volume, as shown here:
# vxvol [-g diskgroup] set fastresync=off volume
Turning FastResync off releases all tracking maps for the specified volume. All
subsequent reattaches will not use the FastResync facility, but perform a full
resynchronization of the volume. This occurs even if FastResync is later turned on.
Performing online relayout
Note: You need a full 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 286:
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, vol02, in disk
group, mydg, to a striped volume with the default number of columns, 2, and default stripe
unit size, 64 kilobytes:
# vxassist -g mydg relayout vol02 layout=stripe