Patent ID: 6751042
Filing Date: 2004-06-15
Classification: G11B

Abstract:
A method of correcting a track density in a data storage device, the device including a laterally movable transducer head and a longitudinally movable data surface, the method comprising steps of:(a) receiving a signal from the transducer head while the data surface moves adjacent to the transducer head; (b) deriving from the received signal of step (a) many values each indicative of a corresponding offset between a corresponding pair of latitudinal reference points on the data surface, the reference points laterally distributed across a series of many longitudinal tracks on the data surface, the many longitudinal tracks defining many successive pairs of the tracks each having an average lateral offset distance therebetween, the many average offset distances defining a statistical distribution having a variance; and (c) shifting at least some of the latitudinal reference points laterally by using the offset-indicative values derived in step (b) so as to reduce the variance of said statistical distribution.