Scenario1 - Define PDS.

Code -

----+----1----+----2----+----3----+----4----+----5----+
//NEWPDS   DD DSN=MTH.DATA.PSFILE,
//            DISP=(NEW,CATLG,DELETE),
//            UNIT=SYSDA,
//            SPACE=(TRK,(3,2,2),RLSE),
//            DCB=(DSORG=PO,RECFM=FB,LRECL=80,BLKSIZE=1600)

Scenario2 - Define a PS.

Code -

----+----1----+----2----+----3----+----4----+----5----+
//NEWPS    DD DSN=MTH.DATA.PS,
//            DISP=(NEW,CATLG,DELETE),
//            UNIT=SYSDA,
//            SPACE=(TRK,(3,2),RLSE),
//            DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=800)

Scenario3 - Define a DA.

Code -

----+----1----+----2----+----3----+----4----+----5----+
//NEWPDS   DD DSN=MTH.DATA.PDS,
//            DISP=(NEW,CATLG,DELETE),
//            UNIT=SYSDA,
//            SPACE=(TRK,(3,2,2),RLSE),
//            DCB=(DSORG=DA,RECFM=FB,LRECL=80,BLKSIZE=4096)

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