Patent ID: 7394607
Filing Date: 2008-07-01
Classification: G11B

Abstract:
1. A disk drive, comprising: a recording medium having servo information written thereon and formed with a data track, part of the data track being overwritten by an adjacent data track on an inner or outer circumference side; a magnetic head for writing or reading information to or from the recording medium; and a control device configured to calculate an offset amount used for adjusting a position of the magnetic head when the magnetic head overwrites part of an adjacent data track or reads information from the partly overwritten data track and moving the magnetic head to an offset position, to which the magnetic head is moved over the calculated offset amount from a predetermined position defined by the servo information, thereby executing a write or read operation of information; wherein the control device detects, when information is written on a plurality of adjacent data tracks on the recording medium, the offset position based on the servo information and controls writing of information according to whether or not the detected offset position meets a predetermined condition.