Disabling Automount – Automatic Drive Letter Assignments

Applies to…

  • DxEnterprise for Windows


By default, the Automount option is enabled on Windows 7, Windows 8, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019 and Windows Vista. This causes file systems to be automatically mounted and assigned a drive letter when volumes are presented to the operating system.


With DxEnterprise you will want to disable the Automount feature. This gives you full control of the mount assignments on all of your volumes and eliminates drive letter slippage and collisions.

To disable Automount do the following on each node in the cluster:

  1. Open a command prompt
  2. Run “diskpart”
  3. Enter “automount disable”

Note: With Automount disabled Microsoft Windows will not bring volumes online until a mount point is assigned. So you will need to mount the volume before you can perform operations such as formatting the volume or setting a volume label. To do so it is recommended that you use DxPS and run:

Dx-SetMountpoint -VolID < volume_id > -MountPath < path >