Using two-stage generation for overriding

When overriding to use a different systems database, IBM® recommends that you generate a new version of the stand-alone dump program. Use the new MVS™ system data sets to build the new version of the stand-alone dump program.

Although the current version of the stand-alone dump program might be able to dump a new version of MVS successfully, it is not guaranteed. MVS might have changed such that the stand-alone dump program would not be able to locate vital information it needs to operate.

To generate a new version of the stand-alone dump program, follow the same steps you followed for a normal two-stage generation, then add the following steps:

Ensure that the new version of the AMDSADMP macro is being used by specifying the correct SYSLIB data set.
Use the NUCLIB, MODLIB, LNKLIB and/or ALIB parameters on the AMDSADMP macro invocation to create the correct stage-two JCL.

The output shown in Figure 1 assembles the version of the AMDSADMP macro contained in the SYSLIB data set SYS1.MACLIB, found on a 3390 DASD with volser=OVRIDE. Because the ALIB parameter is specified, the stage-two JCL will use the SYS1.NUCLEUS, SYS1.MODGEN, and SYS1.LINKLIB system data sets, also found on the 3390 DASD with volser=OVRIDE.

Figure 1. Example: Stage-Two JCL to assemble the AMDSADMP macro with overrides

// EXEC ASMAC,PARM.C='DECK,NOOBJECT'
//C.SYSLIB   DD DSN=SYS1.MACLIB,DISP=SHR,UNIT=3390,VOL=SER=OVRIDE
//C.SYSPUNCH DD DSN=SMITH.TEST.CNTL(SADMP#2),DISP=OLD
//C.SYSIN DD *
        AMDSADMP IPL=D3390,                  IPL FROM DASD                   X
               VOLSER=SADIPL,                VOL=SER=SADIPL                  X
               OUTPUT=(D330,SYS1,SADMP),     DEFAULT OUTPUT DEVICE           X
               MSG=ALL,                      ALL MESSAGES TO CONSOLE         X
               DUMP=('SP(ALL) IN ASID(1) ALSO DATASPACES OF ASID(1,'JESXCF',
               'APPC','SMSVSAM',  'CONSOLES','SYSBMAS') ALSO PAGETABLES OF
               DATASPACES                                                    X
               ALSO SP(ALL) IN ASID('JES2')'),                               X
               MINASID=ALL,                  INCLUDE SWAPPED OUT SPACES      X
               REUSEDS=CHOICE,               PROMPT FOR DATASET REUSE        X
               DDSPROMPT=NO,                 OVERRIDE BUILD DATASETS         X
               ALIB=(OVRIDE,3390)
           END
/*

Note: Using the ALIB parameter is convenient if all of the system data sets used by the stand-alone dump program reside on the same volume. Also, note that the same results could have been achieved by coding the NUCLIB, MODLIB, and LNKLIB keywords separately with each specifying NEWSYS and 3390 for volser and unit.