To unmount an NFS shared resource from a drive letter using the command line
  1. Open a command prompt (this does not need to be an elevated command prompt).

  2. At the command prompt, type:

    umount [–f] {–a | Drive}

    Argument Description


    Forces the unmount of a Network File System (NFS) network drive.


    Unmounts all NFS network drives.


    The drive letter that is mapped to an NFS shared resource.


    To view the complete syntax for this command, at a command prompt, type: umount /?

Additional references