This operand suspends or resumes processing of user mount requests. For the NFS V4 protocol, this operand also suspends or resumes processing of lookup operations from the NFS server into z/OS UNIX file systems or MVS data sets. You can enter the freeze=on command at any time for maintenance purposes. Enter the operand as follows:

>>-+-MODIFY-+--mvsnfs,freeze=-+-on-----+-----------------------><
   '-F------'                 +-off----+   
                              +-onhfs--+   
                              '-offhfs-'   

• If you select on, these messages appear.

  GFSA901I  Mounts Processing Suspended.
  GFSA771I  z/OS UNIX mounts suspended    

  Future mount requests by client users are refused for both z/OS UNIX file systems and z/OS conventional MVS data sets and the message “Permission Denied” displays on their monitors. After issuing a freeze=off operand, mount processing resumes for both z/OS UNIX file systems and z/OS conventional MVS data sets, and these messages appear.

  GFSA902I  Mounts Processing Resumed.
  GFSA772I  z/OS UNIX mounts resumed.   

  Client users can again mount z/OS directories as normal.

• If you select onhfs, future mount requests by client users for z/OS UNIX file systems are refused.
• If you select offhfs, mount processing resumes for z/OS UNIX file systems.