FCB

The FCB macro defines the file control block, which is the central source of information for the BTAM, ISAM, SAM and UPAM access methods.

Indicating whether large files are permitted

At program level, the LARGE_FILE operand controls whether large files are permitted.

Operation	Operands
FCB	: [,LARGE_FILE = *FORBIDDEN / *ALLOWED] :

LARGE_FILE
Only for disk files (ISAM, SAM and UPAM access methods):
The LARGE-FILE operand defines whether or not the logical file size may exceed 32 GB.

= *FORBIDDEN
Default setting: The logical file size may not exceed 32 GB.

= *ALLOWED
Only for files with BLKCTRL î PAMKEY:
The logical file size may exceed 32 GB.