Patent ID: 7522500

Claim:
A method of recording and/or reproducing data with respect to an information storage medium, the information storage medium comprising a first information storage layer comprising a first optimal power control area and a first reserved area adjacent to the first optimal power control area, and a second information storage layer, adjacent to the first information storage layer, comprising a second optimal power control area and a second reserved area adjacent to the second optimal power control area, the first optimal power control area of the first information storage layer being aligned with the second reserved area of the second information storage layer, and the second optimal power control area of the second information storage layer being aligned with the first reserved area of the first information storage layer, the recording and/or reproducing method comprising: recording data on at least one of the first and second optimal power control areas; and determining an optimum recording/reproducing power using the data read from the one of the first and second optimal power control areas, wherein a direction in which the first optimal power control area of the first information storage layer is used different from a direction in which the second optimal power control area of the second information storage layer is used.