INFORMATION RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a multilayer information recording medium recording and reproducing method capable of stable recording and reproduction.

SOLUTION: The medium is formed by attaching together a first information recording medium part having a recording layer on a substrate and a second information recording medium part having a recording layer on another substrate. The medium has a layer data management layer for recording management data indicating a data state of each recording layer. Recording and reproduction can be carried out in the recording layer from anywhere of the information recording medium.

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