Driver letter is unexpectedly assigned after you mount a volume to a folder in Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 EssentialsWindows Server 2012 R2 Standard


Consider the following scenario:
  • You install a new hard disk on a Windows Server 2012 R2-based computer.
  • You open Server manager, click File and Storage Services, click volumes, and then click Disk.
  • You create a new volume on the disk. When you create the volume, you use these options:
    • Format the disk as a GUID partition table (GPT) style disk.
    • Mount the volume to a folder instead of assigning a driver letter to it.
  • You restart the computer.
In this scenario, the volume of the disk is assigned a driver letter after the restart.


To work around this issue, use the Diskpart command or Disk Management to assign the mount folder.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.