Patent ID: 7957240

Claim:
A trial writing method for setting recording conditions for recording information on an optical information recording medium, comprising: creating write patterns that is classified according to an excess, which is obtained by dividing natural number n by an integer constant of two or a larger number, said natural number n is a factor of a mark length in the recording signals train with the window width; selecting arbitral write pattern A in the write patterns; setting write power Pw (A), which is write power to said write pattern A by predetermined process; carrying out trial writing on the write pattern A at the write power of Pw(A) and on the other write pattern with changing the write power within a predetermined range including the Pw (A); wherein said fixed range of Pw is not less than Pw (A) multiplied by a and not more than Pw (A) multiplied by b, where a is not less than 0.8 and not more than 1.0, b is not less than 1.0 and not more than 1.2.