When you try to add a mirror volume to a hard disk that contains three or more existing volumes, you may receive the following pop-up error message:
Logical Disk Manager
Requested operation is not supported.
This problem occurs because the destination dynamic disk was upgraded from a BASIC disk that contained three or more pre-existing partitions that are now hard-linked in the Logical Disk Manager (LDM) Dynamic disks database. This condition is erroneously preventing the mirroring operation from being supported.
To resolve this problem, perform one of the following:
- When establishing the mirror, select another dynamic volume that has enough unallocated free space.
- Backup one of the existing simple volumes on the dynamic disk to which you are trying to mirror. Delete the volume, re-create the volume, and then restore from the backup copy. This frees up a hard-linked entry in the LDM database and allows the original mirroring operation to succeed.
- Create a mirror volume in the same space as before, however, create the mirror in the opposite direction. To do this:
NOTE: All of the methods mentioned above assume the other dynamic disk used as a target does not also contain three or more hard-linked partitions. Pure dynamic disks, ones created with no pre-existing partition, do not exhibit this problem and have no mirroring limitations.
- Create a new simple volume the same size as the volume you want to
mirror using the unallocated space on the original dynamic disk.
- Back up and restore the data from the original volume to the newly
created simple volume.
- Delete the original simple volume, which creates unallocated
- Add a mirror to the new simple volume using the free space created by deleting the simple volume on the original disk.
Microsoft has confirmed this to be a problem in Microsoft Windows 2000.
Article ID: 242436 - Last Review: February 28, 2007 - Revision: 2.2
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Datacenter Server