Patent ID: 7075863

Claim:
An optical disk drive that can write data in an optical disk having a plurality of rotative modes, comprising: a memory unit disposed in the optical disk drive and configured to store information indicating how a tracking offset value is to be varied corresponding to each of the plurality of rotative modes; a microcomputer including a test recording unit and an optimum tracking offset determination unit wherein said test recording unit is configured to read particular information from said memory unit indicating how a tracking offset value is to be varied for a given rotative mode in said plurality of rotative modes wherein the test recording unit writes test data in a first plurality of frames of the optical disk using the tracking offset value being varied in accordance with the particular information being read for said given rotative mode, and wherein said optimum tracking offset determination unit is configured to determine the optimum tracking offset value based on characteristic values of signals reproduced from respective frames of the first plurality of frames.