HOW TO: Move a volume to a different disk without causing service interruptions

Article:HOWTO58995  |  Created: 2011-08-22  |  Updated: 2011-10-27  |  Article URL
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How To


Definition of a volume in terms of subdisks: In Storage Foundation for Windows (SFW) a volume is identified by a contiguous disk area. Subdisks are the basic units in which SFW allocates disk space in a volume.

Moving a volume (subdisk) can be done in the following common scenarios:

  • Decommissioning storage arrays.
  • Lack of space on a disk to expand the volume contiguously.
  • Failing disk subsystem.
  • Re-alinging incorrectly mirrored plexes.
  • Troubleshooting file system performance issues.

To achieve a move; following are the prerequisites that need to be met:

1. The spare disk must belong to the same dynamic diskgroup as that of the volume.
2. Dynamic disks belonging to a Microsoft Disk Management Disk Group do not support the move operation.
3. The spare disk must be larger in size than the actual volume size being moved.

To move a volume (subdisk) follow the procedure as discussed below:

1. Open VEA and highlight the dynamic diskgroup which contains the volume.

2. On the right, click on the disk view tab. Make a note of the disk that you want to move the volume to in case there are multiple disks.

3. Drag and drop the volume to the spare disk as shown in the screenshot below.


 4. The above example is a sample for moving a simple volume layout. Other complex volume layout need careful planning if there are more than one storage arrays involved. Eg: Mirroring.

Important: Moving a volume (subdisk) does not cause any service interruptions or outages and can be safely done while the volume is in use. This also holds true for clustered volume resource in MSCS, VCS or WFC.

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