Information recording medium, recording apparatus and method for an information recording medium, reproducing apparatus and method for an information recording medium computer program for controlling record or reproduction, and data structure including control signal

A recording apparatus for recording record data onto an information recording medium comprising:

• (i) a data area for recording therein the record data;
• (ii) a plurality of temporary defect management areas for temporarily recording therein defect management information in said data area;
• and (iii) a flag area for recording therein distinction information for distinguishing a temporary defect management area in which the defect management information that is effective is recorded, from said plurality of temporary defect management areas, said flag area being disposed in one of said plurality of temporary defect management areas,
• said recording apparatus comprising:
• a first recording device for recording the record data into said data area;
• a second recording device for recording the defect management information into any one of said plurality of temporary defect management areas;
• a distinction information generating device for generating the distinction information on the basis of a recorded condition and an unrecorded condition of said plurality of temporary defect management areas;
• and
• a third recording device for recording the distinction information generated by said distinction information generating device into said flag area.

A reproducing apparatus for reproducing record data recorded on an information recording medium comprising:

• (i) a data area for recording therein the record data;
• (ii) a plurality of temporary defect management areas for temporarily recording therein defect management information in said data area;
• and (iii) a flag area for recording therein distinction information for distinguishing a temporary defect management area in which the defect management information that is effective is recorded, from said plurality of temporary defect management areas, said flag area being disposed in one of said plurality of temporary defect management areas,
• said reproducing apparatus comprising:
• a first reading device for reading the distinction information recorded in said flag area;
• a selecting device for selecting effective one of said plurality of temporary defect management areas, on the basis of the distinction information read by said first reading device;
• a second reading device for reading the defect management information recorded in the effective temporary defect management area selected by said selecting device;
• and
• a reproducing device for reproducing the record data recorded in said data area, on the basis of the defect management information read by said second reading device.