Patent ID: 7492681

Claim:
A recording and/or reproducing apparatus, comprising: an optical pickup which reproduces data from an information storage medium comprising a plurality of information storage layers; and a controller which controls the optical pickup to reproduce the data from the information storage medium, wherein: each of the information storage layers includes an optimal power control area for use in obtaining an optimal recording condition, a reserved area, and a defect management area, the optimal power control area of a first one of the information storage layers is disposed within a different radius of the information storage medium than a radius of the optimal power control area of a second one of the information storage layers adjacent to the first information storage layer, the reserved area of the first information storage layer is disposed adjacent to the optimal power control area of the first information storage layer and is opposite to and a same size as the optimal power control area of the second information storage layer, and the reserved area of the second information storage layer is disposed adjacent to the optimal power control area of the second information storage layer and is opposite to and a same size as the optimal power control area of the first information storage layer.