Patent ID: 7397627
Filing Date: 2008-07-08
Classification: B82Y,G11B

Abstract:
1. A method of controlling tracking of a head in a recording disk drive, comprising: driving a recording disk for rotation, the recording disk including recording tracks and non-magnetic separation tracks each interposed between adjacent ones of the recording tracks, the recording tracks and the non-magnetic separation tracks tracing concentric circles over servo sectors and data sectors; inducing an oscillation of the head in a lateral direction across a boundary between at least select one of the separation tracks and select one of the recording, tracks adjacent the select one of the separation tracks; detecting a variation in a reproduction signal supplied from the head which reads magnetic information of at least the select one of the recording tracks during the lateral movement across the boundary; generating positional information indicating a position of the head based on the variation; and generating a control signal based on the positional information so as to drive the head in the lateral direction for cancellation of a deviation between the head and a centerline of the select one of the recording tracks, a high frequency being multiplexed on the control signal so as to induce the oscillation only when the head is positioned over the servo sectors.