Multi-layered information recording medium, reproduction apparatus, recording apparatus, reproduction method, and recording method

摘要

A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least one defective area is detected in the user data area, the defect list is used to manage the at least one defective area. The defect list storing area is provided in only one of the plurality recording layers.