Patent ID: 7190647

Claim:
An information-recording method for recording information on an information-recording medium by radiating a light beam power-modulated to be at a recording power level and an erasing power level, the information-recording method comprising: overwriting a random pattern on the information-recording medium with light beams having a predetermined recording power and a variety of erasing powers; reproducing the overwritten random pattern to determine a minimum value Pb 1 and a maximum value Pb 2 of the erasing power obtained when the pattern, in which a reproduction jitter or a reproduction error exceeds a predetermined threshold value, is erased; determining an optimum erasing power Pb for performing the recording from the determined minimum value Pb 1 , the determined maximum value Pb 2 , and a relational expression represented by Pb=α×Pb 1 +(1−α)×Pb 2 ; and recording the information with the determined optimum erasing power Pb.