Patent ID: 6466394
Filing Date: 2002-10-15
Classification: G11B

Abstract:
A storage device comprising:a disk having a servo region and a data region formed based on time division, the servo region including a plurality of tracks formed at a specified track pitch, each track including servo patterns in number m, where m is a natural number, each servo pattern having a servo pattern length of 1/m track pitch and the data region storing therein data; a position detecting unit for detecting a position of a head on the disk according to the servo patterns and outputting a result of detection as a detected position signal; a positional error computing unit for obtaining a positional error between the position detected signal fed-back by said position detecting unit and a positional error signal indicating a target position of the head and outputting a result of computation as a positional error signal; an amplifier for amplifying the positional error signal with a prespecified gain and outputting a result of amplification as an amplified positional error signal; a gain setting unit for setting a gain in said amplifier at the time of data reading to a lower value as compared to a gain at the time of data writing; and a head moving unit for obtaining an operation rate corresponding to a movement rate of said head according to the amplified positional error signal and moving said head according to the obtained operation rate.