Patent ID: 6351342
Filing Date: 2002-02-26
Classification: G11B

Abstract:
A method of controlling position of an actuator arm in a disc drive, comprising:providing a disc having first and second disc surfaces, each of the first and second disc surfaces having servo samples recorded thereon, the servo samples recorded on the first and second disc surfaces being in skewed relation to one another and separated by a servo spacing; moving the first and second disc surfaces relative to first and second transducers, each of the first and second transducers being positioned relative to one of the first and second disc surfaces to read information therefrom, the servo samples on each disc surface moving past the corresponding transducer at a rate of one servo sample each servo time period; writing data to the first disc surface, the data including servo samples; during writing data to the first disc surface, reading servo samples intermittently from the second disc surface; and controlling the position of the actuator arm based on the servo samples read.