Information recording medium, recording apparatus, reproduction apparatus, recording method and reproduction method

Abstract

An information recording medium is provided that includes a data area for recording user data and a defect management area for recording a defect list for managing N number of defect areas existing in the data area, where N is an integer satisfying N≧0. The defect list includes two or more blocks, and further includes a header located at a fixed position in the defect list and N number of defect entries, located subsequent to the header, including position information on the respective positions of the N number of defect areas. An anchor is located subsequent to the defect entries, and the header includes first update times information representing the number of times that the defect list has been updated. The anchor includes second update times information representing the number of times that the defect list has been updated.

1 . An information recording medium, comprising: 
 a data area for recording user data, and    a plurality of defect management areas for recording a defect list for managing N number of defect areas existing in the data area, where N is an integer satisfying N≧0;    wherein:    the plurality of defect management areas are areas in which the same information for defect management is recorded in multiplex:    the defect list includes:    a header located at a fixed position in the defect list,    N number of defect entries respectively including position information on positions of the N number of defect areas, and    an anchor;    the header, the N number of defect entries, and the anchor are located in this order in the defect list;    the header includes:    a defect list identifier for identifying the defect list, first update times information representing the number of times which the defect list has been updated, and    a defect entry number representing the number of the N number of defect entries; and    the anchor includes:    an anchor identifier for identifying the anchor of the defect list, and    second update times information representing the number of times which the defect list has been updated.    
   
   
       2 . A reproduction apparatus for reproducing information recorded on an information recording medium according to  claim 1 .  
   
   
       3 . A recording apparatus for recording information on an information recording medium according to  claim 1.