Additional syntax for LRECL=(bytes)

LRECL=nnnnnK: Specifies the length in kilobytes for variable-length spanned records in ISO/ANSI/FIPS Version 3 tape data sets that are processed by the Data Facility Product using the extended logical record interface (XLRI). nnnnn is from 1 through 16,383 and indicates multiples of 1024 bytes. The value in the DCB macro must already be coded as LRECL=0K or LRECL=nnnnnK. If a K is coded for any other type of data set, only the numeric value of LRECL is recognized.
LRECL=X: For QSAM only, specifies that the logical record length exceeds 32,760 bytes for variable-length spanned records. This option is not valid for ISO/ANSI/FIPS Version 3 variable-length records.