In this example, two sequential data sets that reside on 9-track tape volumes are compared.

  //TAPETAPE JOB  ...
  //         EXEC PGM=IEBCOMPR
  //SYSPRINT DD  SYSOUT=A
  //SYSUT1   DD  DSNAME=SET1,UNIT=tape,LABEL=(,NL),
  //             DCB=(RECFM=FB,LRECL=80,BLKSIZE=2000),
  //             DISP=(OLD,KEEP),VOLUME=SER=001234
  //SYSUT2   DD  DSNAME=SET2,UNIT=tape,LABEL=(,NL),
  //             DCB=(RECFM=FB,LRECL=80,BLKSIZE=1040),
  //             DISP=(OLD,KEEP),VOLUME=SER=001235
  //SYSIN    DD  DUMMY
  /*

The job control statements are discussed, as follows:

• SYSUT1 DD defines an input data set (SET1), which resides on an unlabeled 9-track tape volume.
• SYSUT2 DD defines an input data set (SET2), which resides on an unlabeled 9-track tape volume.
• SYSIN DD defines a dummy data set. Because no user routines are used and the input data sets have a sequential organization, utility control statements are not necessary.