Patent ID: 7239472
Filing Date: 2007-07-03
Classification: G11B

Abstract:
1. A data write method which is applied to a disk drive, for recording data on a disk medium by a head mounted on a rotary type actuator, the method comprising: deciding a position of a data track to write data on the disk medium in accordance with an instruction sent from a host system; determining whether or not the position of the data track is included in an intermediate circumferential area on the disk medium; in the case where the position of the data track is included in an inner circumferential area or an outer circumferential area on the disk medium in accordance with the determination results, carrying out a track pitch conversion processing so that a track pitch of the data track is set larger than a track pitch in the intermediate circumferential area based on azimuth angle of the head; carrying out servo control for positioning the head at the position of the data track on the disk medium based on the track pitch converted by the track pitch conversion processing or the track pitch in the intermediate circumferential area; and carrying out a data write operation by the head positioned by the servo control.