This operand unmounts a mount point that is currently active. The path name for a z/OS UNIX file object cannot exceed 126 bytes. File names specified with a prefix must be specified in single quotes with the prefix (/hfs or /mvs) followed by the z/OS UNIX path name or the MVS data set name, respectively. For example: F mvsnfs,unmount=‘/HFS/u/jones’. Note that the currently active prefix settings apply for determining whether a z/OS UNIX file or an MVS data set is specified. Enter the operand as follows:

>>-+-MODIFY-+--mvsnfs,unmount=‘mount_point_name’---------------><
   '-F------'                                      

• If the mount point is active, the server responds.

  GFSA916I mount_point UNMOUNTED.

• If the mount point you specify does not exist when you enter the command, the server displays messages similar to the following messages.

  GFSA917I SMITH NOT MOUNTED.
  GFSA917I /HFS/U/JONES NOT MOUNTED.    

Once the mount point is removed, client users are unable to access this mount point, and they get the “Stale NFS File Handle” message. Client users have to enter the umount command to end the stale file handle problem.