Information recording medium, information recording method, information recording device, information playback method, and information playback device

An information recording method for recording information on a write-once type information recording medium including at least one recording layer,

• wherein the at least one recording layer has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track being divided into blocks each of which being a minimum unit in which recording is performed,
• the information recording medium includes a management information area where management information is recorded and a user data area where user data is recorded,
• each of the management information areas of both the land track and the groove track on each recording layer of the at least one recording layer is disposed at a same distance from the center of the information recording medium, and
• the at least one recording layer is sequentially used from a position farthest from a surface of the information recording medium toward a position closest to the surface of the information recording medium.

An information recording device that records information on a write-once type information recording medium including at least one recording layer,

• the at least one recording layer of the information recording medium having a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track being divided into blocks each of which being a minimum unit in which recording is performed,
• the information recording medium including a management information area where management information is recorded and a user data area where user data is recorded,
• each of the management information areas of both the land track and the groove track on each recording layer of the at least one recording layer is disposed at a same distance from the center of the information,
• the information recording device comprising:
• an optical pickup that irradiates the information recording medium with a laser beam;
• a mechanical controller that controls the optical pickup;
• and
• a recording part that controls the recording of the management information and the user data,
• wherein the recording part controls the recording of the management information in the management information area such that the recording is sequentially performed from a position farthest from a surface of the information recording medium toward a position closest to the surface of the information recording medium with respect to the at least one recording layer.

An information playback method for playing back information from a write-once type information recording medium including at least one recording layer,

• wherein the at least one recording layer has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track is divided into blocks each of which being a minimum unit in which recording is performed,
• the information recording medium includes a management information area where management information is recorded and a user data area where user data is recorded,
• each of the management information areas of the land track and the groove track on each recording layer of the at least one recording layer is disposed at a same distance from the center of the information recording medium,
• a boundary between a recorded management information area and a non-recorded management information area is sequentially searched from a position farthest from a surface of the information recording medium toward a position closest to the surface of the information recording medium, and the latest management information is acquired from the recorded management information area adjacent to the boundary.

An information playback device that plays back information from a write-once type information recording medium including at least one recording layer,

• the at least one recording layer of the information recording medium having a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track being divided into blocks each of which being a minimum unit in which recording is performed,
• the information recording medium including a management information area where management information is recorded and a user data area where user data is recorded,
• each of the management information areas of both the land track and the groove track on each recording layer of the at least one recording layer being disposed at a same distance from the center of the information recording medium,
• the information playback device comprising:
• an optical pickup that irradiates the information recording medium with a laser beam;
• a mechanical controller that controls the optical pickup;
• and
• a playback part that controls the playback of the management information and the user data,
• wherein the playback part controls the playback of the management information such that a boundary between a recorded management information area and a non-recorded management information area is sequentially searched from a position farthest from a surface of the information recording medium toward a position closest to the surface of the information recording medium, and such that the latest management information is acquired from the recorded management information area adjacent to the boundary.