JSI Tip 8708. When you fail over a virtual machine in Virtual Server 2005, the drive letter of the shared cluster disk does NOT appear in My Computer, or changes to a question mark?

In addition to the subject behavior, you may notice that the partition properties of the shared cluster disk are wrong.

To workaround this behavior with Windows Server 2003 clusters, and Windows 2000 server clusters, log off the virtual machine and log back on.

NOTE: See Drive Letter Not Visible or Drive Letter Changed to Question Mark or Partition Properties or Label Not Accurate.