Optical disk medium, and data recording method and device

摘要

A molding and film forming apparatus 700 molds a disc substrate from a stamper 330 formed from an optical disc disc-master 320 and forms a coating film, onto the disc substrate, thereby forming a recorded optical disc 360. A postscript apparatus 200 uses a laser beam to write postscript information onto an optical disc 340 formed by the molding and film forming apparatus 700 to produce an optical disc 350 on which postscript information 420 has been recorded. The postscript information is recorded in a conventional format and the postscript information can be reproduced by an existing reproducing apparatus. When known data is recorded at a predetermined location by molding of the disc substrate, a part of the known data can be rewritten to the coating film and desired information is recorded in accordance with whether or not rewriting has been performed.