Patent ID: 6728061
Filing Date: 2004-04-27
Classification: G11B

Abstract:
A head position control method for a disk device, of controlling a position of a head on tracks of a rotating disk, comprising:a step of reading position information for a sector of said disk with the head; a step of detecting a current position of said head by demodulating said position information; and a step of calculating an actuator control amount for driving the rotary actuator which moves said head, from a control amount corresponding to a position error between a target position and said current position and an eccentricity correction amount for said disk, wherein said calculating step has a step of reading out eccentricity correction information corresponding to the position of said head from the eccentricity correction information stored for each of a plurality of regions, divided in the radial direction on said disk, and a step of calculating said eccentricity correction amount from said read out eccentric correction information, said calculating step comprising: a storage step for storing eccentricity correction information for the current position at start of seek operation; a step for reading eccentricity correction information for the region of the target position of said seek operation; and a step for calculation of said eccentricity correction amount according to said read-out eccentricity correction information.