//DD1BB DD DSNAME=EVER,DISP=(NEW,KEEP),UNIT=3390,
//         RECFM=FB,LRECL=326,BLKSZLIM=32760,
//         SPACE=(23472,(200,40))

DD statement DD1B defines a new data set named EVER on a 3390 DASD. The DD keywords RECFM and LRECL contain the information necessary to complete the data control block. BLKSZLIM places an upper limit on the block size to be determined by the system.

//DD2B  DD DSNAME=NEVER,DISP=(NEW,KEEP),UNIT=3590,
//         RECFM=FB,LRECL=80,BLKSZLIM=40K

DD statement DD2B defines a new data set named NEVER on a 3590 TAPE device. The DD keywords RECFM and LRECL contain the information necessary to complete the data control block. BLKSZLIM places an upper limit on the block size to be determined by the system.