Changing a Volume Layout
The volume Change Layout 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 layout
- Select the volume to be changed to a different layout.
- Choose Actions > Change Layout.
- Complete the Change Volume Layout dialog box as follows:
Volume Name: |
If the correct volume name does not already display in this field, enter the volume name. |
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Layout: |
Choose the new volume layout (Concatenated, Striped, RAID-5, Concatenated Pro, or Striped Pro.)
For a striped, RAID-5, or striped pro volume, provide the following information: |
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Options: |
Click Show Options to access the optional settings for this task. |
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- After 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:
Volume Name: |
The name of the volume that is undergoing a layout change. |
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Initial Layout: |
The original layout of the volume. |
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Desired Layout: |
The new layout for the volume. |
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Status: |
The status of the relayout task. |
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% Complete: |
The progress of the relayout task. |
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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: |
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The Volume Change Layout task requires a volume name and a different volume layout.
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Volumes remain accessible during online relayout.
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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.
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If no disk space is specified, VxVM uses available space on disks in the current disk group.
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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.
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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 with different layouts, a target 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.
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Log plex layouts do not change. VxVM removes and/or replaces log plexes, depending on the new layout.
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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).
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A volume cannot undergo multiple relayouts at the same time.
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This task cannot be used to change the layout of a volume with a sparse plex.
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This task may fail for volumes that were not created by VxVM or the vxassist command.
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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.
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During a relayout, many other tasks are unavailable for the volume.
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A mirrored or striped volume requires at least two disks.
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A RAID-5 volume requires at least three disks.
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