Use the RECL specifier to specify the record length.
The units used for specifying record length depend on the form of the data:
Formatted files (FORM= ' FORMATTED ' ): Specify the record length in bytes.
Unformatted files (FORM= ' UNFORMATTED ' ): Specify the record length in 4-byte units, unless you specify the -assume byterecl option to request 1-byte units.
For all but variable-length sequential records on 64-bit addressable systems, the maximum record length is 2.147 billion bytes (2,147,483,647 minus the bytes for record overhead). For variable-length sequential records on 64-bit addressable systems, the theoretical maximum record length is about 17,000 gigabytes. When considering very large record sizes, also consider limiting factors such as system virtual memory.