Patent ID: 7426162
Filing Date: 2008-09-16
Classification: G11B

Abstract:
1. A method of recording and/or reproducing data with respect to an information storage medium, wherein the information storage medium comprises 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 comprising a second optimal power control area and a second reserved area adjacent to the second optimal power control area disposed such that the first optimal power control area in the first information storage layer is aligned with the second reserved area in the second information storage layer, and the second optimal power control area in the second information storage layer is aligned with the first reserved area in the first information storage layer, the recording and/or reproducing method comprising: recording data on at least one of the first and second optical power control areas; and determining an optimum recording or reproducing power using the data read from the at least one of the first and second optical power control areas, wherein the data is recorded on the first and second optimal power control areas in opposite directions.