Patent ID: 7599257
Filing Date: 2009-10-06
Classification: G11B

Abstract:
1. A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus comprising: pickup means for irradiating laser light to the disk recording medium for the writing or reading and for detecting reflected light from the disk recording medium; transporting means for transporting the pickup means in a direction of a radius of the disk recording medium; determining means for inputting a pull-in signal as a sum signal low component of the reflected light detected by the pickup means and for generating a determination signal indicating whether the pickup means is in the Burst Cutting Area or not by using an absolute value of a difference in a direction of a time axis of the pull-in signal; and seek control means for starting the transportation of the pickup means to the Burst Cutting Area by using the transporting means, for monitoring the determination signal during the transportation, and for finishing the transportation of the pickup means by the transporting means based on the determination signal.