RECORDING MEDIUM, RECORDING DEVICE, REPRODUCTION DEVICE, RECORDING METHOD, AND REPRODUCTION METHOD.

摘要

It is possible to improve the usefulness of a write once type recording medium having a plurality of recording layers. In the write once type recording medium having a plurality of recording layers, there are provided a normal recording/reproduction area, an alternate area, a first alternate management information area, and a second alternate management information area (TDMA), and furthermore, write presence/absence marker information (space pit map) is recorded. For example, the write presence/absence marker information is recorded in the second alternate management information area. The second alternate management information area is an area for realizing rewrite of alternate management information by additionally writing alternate management information associated with alternate processing. Furthermore, according to the write presence/absence marker information, it is possible to judge whether the each data unit (cluster) of each recording layer on the recording medium has been written in or not. The second alternate management information area (TDMA) of each layer is successively used for updating the alternate management information and the write presence/absence marker information.