TMSCP_SERVE_ALL

   TMSCP_SERVE_ALL is a bit mask that controls the serving of tapes.
   The settings take effect when the system boots. You cannot change
   the settings when the system is running.

   Starting with OpenVMS Version 7.2, the serving types are
   implemented as a bit mask. To specify the type of serving your
   system will perform, locate the type you want in the following
   table and specify its value. For some systems, you may want
   to specify two serving types, such as serving all tapes except
   those whose allocation class does not match. To specify such a
   combination, add the values of each type, and specify the sum.

   In a mixed-version cluster that includes any systems running
   OpenVMS Version 7.1-x or earlier, serving all available tapes
   is restricted to serving all tapes except those whose allocation
   class does not match the system's allocation class (pre-Version
   7.2 meaning). To specify this type of serving, use the value 9,
   which sets bit 0 and bit 3. The following table describes the
   serving type controlled by each bit and its decimal value:

          Value
          When
   Bit    Set     Description

   Bit 0  1       Serve all available tapes (locally attached and
                  those connected to HSx and DSSI controllers).
                  Tapes with allocation classes that differ from the
                  system's allocation class (set by the ALLOCLASS
                  parameter) are also served if bit 3 is not set.

   Bit 1  2       Serve locally attached (non-HSx and non-DSSI)
                  tapes.

   Bit 2  N/A     Reserved.

   Bit 3  8       Restrict the serving specified by bit 0. All tapes
                  except those with allocation classes that differ
                  from the system's allocation class (set by the
                  ALLOCLASS parameter) are served.

                  This is pre-Version 7.2 behavior. If your cluster
                  includes systems running OpenVMS Version 7.1-x
                  or earlier, and you want to serve all available
                  tapes, you must specify 9, the result of setting
                  this bit and bit 0.

   Although the serving types are now implemented as a bit mask, the
   values of 0, 1, and 2, specified by bit 0 and bit 1, retain their
   original meanings:

   o  0 - Do not serve any tapes (the default for earlier versions
      of OpenVMS).

   o  1 - Serve all available tapes.

   o  2 - Serve only locally attached (non-HSx and non-DSSI) tapes.

   If the TMSCP_LOAD system parameter is 0, TMSCP_SERVE_ALL is
   ignored.