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

Volume Tasks
Moving, Splitting, and Joining Subdisks
Chapter 4150
NOTE
• Subdisks are typically moved to reorganize disk space.
• The disk space occupied by the original subdisk is returned to the
free space pool.
• A subdisk in a mirrored, striped, or RAID-5 volume should not be
moved to a disk that already contains a copy or part of that volume.
• If the Subdisk Move task fails and leaves some unused subdisks
(that is, subdisks that are not associated with a volume) on the
system, you can use the Subdisk Remove task to free the space
occupied by the unused subdisks.
Splitting a Subdisk
The Subdisk Split command allows you to split a subdisk. After the
subdisk is split, the resulting two subdisks will reside on the same
section of the same disk. You can then use the Subdisk Move command
to move one or both subdisks to other disks. You may want to split and
move a subdisk to make the best use of your disk space. A split subdisk
can be joined back together again with the Subdisk Join command.
You can use the Object View window (Disk Groups > Object View) or
the Volume to Disk Mapping window (Disk Groups > Disk/Volume
Map) to view the subdisks in a disk group. You can use the Volume Layout
Details window (Volumes > Show Layout) to view subdisks in a specific
volume.
To split a subdisk into multiple subdisks
Step 1. Identify the subdisk that you want to split and display it in the right
pane.
Step 2. Right-click on the subdisk you want to split to bring up its context menu.
Step 3. Select Split from the context menu.
Step 4. The welcome screen of the Subdisk Split wizard appears. Click Next to
continue.