 |
» |
|
|
|
This procedure changes the layout of a volume without interrupting access
to data. You can use this task to change the redundancy or performance
characteristics of an existing volume. You can view the progress of the relayout task through the
Relayout Status Monitor window. You can also use the Relayout Status
Monitor window to pause, abort, continue, or reverse the relayout
task. The Relayout Status Monitor appears automatically when a relayout
task begins. When a volume relayout is in progress, paused, or aborted,
you can also access the Relayout Status Monitor through the Volume Properties
window. To change a volume's layout | |
Select the volume to be changed to a different
layout. Choose Volumes > Change Layout (Selected menu)
or Volume Change Layout (Command Launcher). Complete the Change Volume Layout dialog box as follows: Volume
Name: | If the correct
volume name is not already displayed in this field, type the volume's
name or click Browse to select the volume. | Layout: | Choose the
new volume layout: Concatenated Change the volume to a simple, concatenated volume. Striped Change the volume to a striped volume. RAID-5 Change the volume to a RAID-5 volume. Concatenated Pro Change the volume to a layered concatenated volume. Striped Pro Change the volume to a layered striped volume.
For
a striped, RAID-5, or striped pro volume, provide the following
information: In the Number of
Columns field, specify the number of columns (disks) across which
the volume should be striped. To specify a stripe unit size other than the default, type
the stripe unit size in the Stripe Unit Size field. To specify a
size unit, attach an s (sectors), k (kilobytes), m (megabytes), or g (gigabytes) to the size.
| Options | Click Show Options to
access the optional settings for this task. To retain the original volume size when the volume layout
changes, click Retain Volume Size at Completion. To specify the size of the pieces of data that are copied
to temporary space during the volume relayout, type the size in
the Temp Space Size field. To specify additional disk space to be used for
the new volume layout (if needed), specify the disk in the Disk(s)
field or click Browse to select a disk. To specify the temporary disk space to be used during the
volume layout change, specify the disk in the Temp Disk(s) field
or click Browse to select a disk. If the volume contains plexes with different layouts, specify
the plex to be changed to the new layout in the Target Plex field.
|
When you have provided all necessary information in the dialog
box, click OK. The Relayout Status Monitor window appears. This
window provides you with the following information and options: Volume
Name: | The name
of the volume that is undergoing a layout change. | Initial
Layout: | The original
layout of the volume. | Desired
Layout: | The new layout
for the volume. | Status: | The status
of the relayout task. | %
Complete: | The progress
of the relayout task. | Options | To
stop the relayout task temporarily, click Pause. To cancel the relayout task, click Abort. To resume the paused or aborted relayout task, click Continue. To undo the layout changes and return the volume
to its original layout, click Reverse.
|
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: |
|---|
This
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 progress of the layout change and allows you to abort, pause,
or reverse the task. If no disk space is specified, the Volume Manager
uses available space on disks in the current disk group. If the temporary space size is not specified, the
Volume Manager 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, the Volume Manager uses a larger size. If all of the plexes in the volume have identical
layouts, the Volume Manager changes all plexes (except log plexes)
to the new layout. If the volume contains plexes with different
layouts, a target plex must be specified. When a target plex is
specified, the Volume Manager changes the layout of the target plex
and leaves the other plexes in the volume alone. Log plex layouts do not change. The Volume Manager
may remove and/or replace 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 the Storage Administrator 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.
|
|
Printable version
