Record length specification - Key = '006B'

DALLRECK indicates that the record length of an ISO/ANSI/FIPS Version 3 tape data set is specified in increments of 1,024 (K).

When you code DALLRECK, # must be zero; LEN and PARM are not specified. You code DALLRECK only if specifying DALLRECL. When DALLRECL is specified with DALLRECK, the maximum value of DALLRECL is 16,383 (3FFF). See z/OS MVS JCL Reference for the restrictions regarding the use of LRECL for nnnnnK.

Example: To specify a record length of 80K, code:

KEY    #      LEN   PARM
006B   0000   -     -