Patent ID: 6377527
Filing Date: 2002-04-23
Classification: G11B

Abstract:
A disk drive device for performing recording and/or reproduction of information by irradiating optical beams on a recording surface of information tracks for recording on a disk type recording medium, wherein the disk drive device comprises:a counting means for counting a number of tracking errors, prior to the recording or reproduction upon loading the disk type recording medium into the drive device, when acceleration from low rotational driving up to a target rotational speed is started in a condition in which a tracking servo is in an OFF condition; and, a control means for performing recording or reproduction of information by turning the tracking servo ON at a rotational speed that is lower than the target rotational speed in case the number of counts has exceeded the threshold by comparing the number of counts as counted by the counting means with a specified threshold for determining vibration, and for performing recording or reproduction of information by turning the tracking servo ON at the target rotational speed in case the rotational speed has reached the target rotational speed without the number of counts exceeding the threshold.