VERITAS Volume Manager 3.5 User's Guide - VERITAS Enterprise Administrator (June 2002)

Changing a Volume Layout
96 VERITAS Volume Manager User’s Guide - VEA
If you need to pause, abort, continue, or reverse a relayout task after you close the
Relayout Status Monitor window, you can access the Relayout Status Monitor
through the Volume Properties window.
Notes:
- The Volume Change Layout task requires a volume name and a different volume
layout.
- Volumes remain accessible during online relayout.
- This task may take a long time, depending on the volume size and other factors. The
Relayout Status Monitor shows the progressof thelayoutchangeandallowsyoutoabort,
pause, or reverse the task.
- If no disk space is specified, VxVM uses available space on disks in the current disk
group.
- If the temporary space size is not specified, VxVM uses an appropriate size. Specifying a
larger temporary space size speeds up the layout change process because larger pieces of
data are copied at a time. If the specified temporary space size is too small, VxVM uses a
larger size.
- If all of the plexes in the volume have identical layouts, VxVM changes all plexes (except
log plexes) to the new layout. If the volume contains plexes withdifferentlayouts, atarget
plex must be specified. When a target plex is specified, VxVM changes the layout of the
target plex and leaves the other plexes in the volume alone.
- Log plex layouts do not change. VxVM removes and/or replaces log plexes, depending
on the new layout.
- If the volume length changes as a result of the layout change and the volume contains a
file system, the file system length is automatically adjusted (if possible).
- A volume cannot undergo multiple relayouts at the same time.
- This task cannot be used to change the layout of a volume with a sparse plex.
- This task may fail for volumes that were not created by VxVM or the vxassist
command.
- If the relayout is reversed, the volume returns to its original layout. However, data in the
volume may not return to its original storage location.
- During a relayout, many other tasks are unavailable for the volume.
- A mirrored or striped volume requires at least two disks.
- A RAID-5 volume requires at least three disks.