Purpose of the subdisk commands

With the commands Move Subdisk, Split Subdisk, and Join Subdisk, you can move subdisks to other locations within the dynamic disk group, split subdisks, and join them back together. The flexibility of moving subdisks, splitting them, and joining them lets you make best use of your disk space.

Note:

Dynamic disks belonging to a Microsoft Disk Management Disk Group do not support the Move Subdisk, Split Subdisk, and Join Subdisk commands.

Refer to the following topics to understand why you need to move or split your subdisks: