VMS Help SET, PREFERRED_PATH, Examples  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    1.$ SET PREFERRED_PATH $10$DUA10: /HOST=HSC014

      Prior to issuing this command, the $10$DUA10: disk device
      has host HSC015 as its primary path and host HSC014 as its
      secondary path. Issuing this command selects host HSC014 as the
      preferred path.

      Note that the preferred path has been recorded by the class
      driver; however, the disk will remain on the current path
      (HSC015) until the next time the path selection process is
      initiated.

    2.$ SET PREFERRED_PATH $10$DUA10: /HOST=HSC014 /FORCE

      To make the path change occur immediately, include the
      /FORCE qualifier on the command line with the preferred path
      specification.

    3.$ SET PREFERRED_PATH $10$DUA10: /FORCE

      Issue this command to initiate path selection processing if
      the specified device has a primary path that differs from the
      preferred path.

      If the preferred path is available, the device moves to that
      path.

    4.$ SET PREFERRED_PATH $10$DUA10: /NOHOST

      Remove the specified preferred path by using the /NOHOST
      qualifier if the device should no longer have a preferred path.