The umount(1w) Windows command-line utility disconnects
the specified NFS-mounted drive. You must supply at least one of
the following options or arguments.
-f
Forces deletion of network file system (NFS) network
drives.
-a
Deletes all NFS network drives. If there are active
connections, umount prompts you for confirmation unless you
also use the -f option.
driveletter
The letter of the logical drive to be disconnected.
networkmount
The network mount point to be disconnected. This mount must
have been created using the net use Windows command-line
utility without specifying a drive letter.