Do not code the following parameters with the DSID parameter.

BURST
CHARS
DDNAME
DYNAM
FLASH
MODIFY
MVSGP
QNAME

For 3540 diskette input/output units: A DSID parameter on a DD *, DD DATA, or sysout DD statement is ignored except when detected by a diskette reader as a request for an associated data set. See 3540 Programmer's Reference.

On a DD * or DD DATA statement processed by a diskette reader, you can specify DSID, VOLUME=SER, BUFNO, and LRECL to indicate that a diskette data set is to be merged into the input stream following the DD statement.