Label volumes in a Windows-based virtual machine to ensure that they are correctly mapped before you export the virtual .
To set a label from the command prompt, type:
To list and verify all volume labels, use the diskpart utility:
After importing the virtual machine, use Disk Manager to reassign the drive letters. The labels you assigned before the export will help to identify the drives. For instructions on reassigning drive letters on a Windows system, search for the Microsoft Support web site.