Patent ID: 7355943

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 and the second reserved area of the second information storage layer being disposed within an identical radius range, and the second optimal power control area of the second information storage layer and the first reserved area of the first information storage layer being disposed within an identical radius range, the recoding 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.