How to manage tape data sets like DD,UNIT,DCB,Volume Parameter in JCL

Examples of simple DD statements for tape data sets The allocation of an existing cataloged data set //JOURNAL   DD    DSNAME=MMA2.AR.JOURNA...

Examples of simple DD statements for tape data sets

The allocation of an existing cataloged data set

//JOURNAL  DD   DSNAME=MMA2.AR.JOURNAL,DISP=OLD

The allocation of an existing uncataloged data set

//JOURNAL  DD   DSNAME=MMA2.AR.JOURNAL,DISP=OLD,

               UNIT=TAPE,VOL=SER=300123

The allocation of an existing, uncataloged multi-volume data set

//JOURNAL  DD   DSNAME=MMA2.AR.JOURNAL,DISP=OLD,

               UNIT=TAPE,

               VOL=SER=(300123,300124,300125,300126)

The allocation of a new data set on an unspecified tape volume

//JOURNAL  DD   DSNAME=MMA2.AR.JOURNAL,DISP=(NEW,CATLG,DELETE),

               UNIT=TAPE

Examples of UNIT parameters

A request for two tape drives

UNIT=(TAPE,2)

A request that defers the mounting of the tape until the data set is opened

UNIT=(TAPE,,DEFER)

A request for the same tape drive that was used for the data set described by the DD statement for TAPEDD1

UNIT=AFF=TAPEDD1

Examples of VOLUME parameters

A specific request for four named volumes

VOL=SER=(163013,163014,163015,163016)

A non-specific request for up to 20 volumes

VOL=(,,,20)

A request for the third volume of a multi-volume data set

VOL=(,,3)

A specific request for two private volumes

VOL=(PRIVATE,SER=(MMA301,MMA302))

A specific request for a private volume that shouldn’t be dismounted

VOL=(PRIVATE,RETAIN,SER=MMA400)

A RETPD parameter that sets a retention period of 30 days

//LNMAST   DD   DSNAME=MMA2.LN.MASTER,DISP=(NEW,KEEP),

               UNIT=TAPE,VOL=SER=300123,RETPD=30

An EXPDT parameter that sets the expiration date to the last day of 2002

//JOURNAL  DD   DSNAME=MMA2.AR.JOURNAL,DISP=(NEW,CATLG,DELETE)

               UNIT=TAPE,EXPDT=2002/365

Examples of LABEL parameters

Specifies IBM standard labels with user labels

LABEL=(,SUL)

Specifies processing of the fourth data set and ISO/ANSI/FIPS standard labels

LABEL=(4,AL)

Specifies that label processing be bypassed and that the second data set be processed (which is the first set of data records on a tape with standard labels)

LABEL=(2,BLP)

Specifies that the tape volume is unlabelled

LABEL=(,NL)

Examples of DCB parameters

The data set should be written in ASCII format

DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=4000,OPTCD=Q)

The data set should be written with 1600 bpi on a dual-density tape drive

DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=4000,DEN=3)

The data set should be written with data compaction on a cartridge tape drive

DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=4000,TRTCH=COMP)