Patent ID: 7545713

Claim:
An access method for use when switching from an operation of recording information into an optical disk to an operation of reproducing information from the optical disk or switching from an operation of reproducing to an operation of recording, comprising: a calculating step of calculating a rotating speed n 2 of a motor for rotating the optical disk given that a linear velocity in a first access position after the switching is equal to a linear velocity in a second access position before the switching; a determining step of determining whether the calculated rotating speed n 2 satisfies a pair of relational expressions n 2 >n 0 and n 2 >n 1 or a pair of relational expressions n 2 <n 0 and n 2 <n 1 where n 0 is a rotating speed of the motor before the switching and n 1 is a target rotating speed of the motor after the switching; a changing step of changing a control mode from Constant Linear Velocity to Constant Angular Velocity and the rotating speed of the motor from n 0 to n 1 if either one of the pairs of relational expressions is determined to be satisfied; and a shifting step of shifting a position to be accessed from the first access position to the second access position after the changing step.