Patent ID: 7423941

Claim:
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; a defect list storing area for storing a defect list that is information for managing a defective area detected in the user data area; and a spare area for replacing the defective area, wherein the defect list storing area is provided in a prescribed layer of the plurality of recording layers, the defect list is information for managing a defective area detected in the prescribed layer and a defective area detected in a recording layer other than the prescribed layer, at least one of the plurality of recording layers other than the prescribed layer comprises a spare defect list storing area that is used to record the defect list when the defect list storing area is not usable, the defect list includes defect entry information, the defect entry information includes a replacement status flag indicating whether or not the defective area is replaced with the spare area, positional information indicating a location of the defective area, and positional information indicating a location of the spare area, and the positional information indicating the location of the spare area indicates zero when the defective area is not replaced with the spare area.