WRITE-ONCE INFORMATION RECORDING MEDIUM, INFORMATION RECORDING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION REPRODUCING APPARATUS, AND INFORMATION REPRODUCING METHOD.

摘要

A plurality of space bitmaps (SBM 30 #0, SBM 30 #1) are formed for the user data area of a single recording layer.  One block size of disc management structure update unit, which includes one of the plurality of space bitmaps and also includes a disc definition structure (TDDS 32), is recorded in a management information area (TDMA 17).  In this way, data including the disc definition structure (TDDS 32) can always be disposed in one block located at the forefront of the management information area (TDMA 17).