| 摘要 |
A multi-layered disc (D 1 , D 2 , D 3 ) is provided with a plurality of recording layers laminated with each other in a direction of a normal line of the recording layers, in each of which an information data recording area ( 2, 4 ) for recording information data and a control data recording area ( 1, 3 ) for recording control data to control an operation of recording and/or reproducing the information data are disposed on a same plane, the control data being recorded by a CAV method over a plurality of tracks in the control data recording area. The control data recording area in each of the recording layers is disposed such that the control data recording area ( 1 ) of one of the recording layers is not superimposed with the control data recording area ( 3 ) of another of the recording layers in the direction of the normal line.
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