Patent ID: 6493179
Filing Date: 2002-12-10
Classification: G11B

Abstract:
A magnetic disk unit comprising:a magnetic disk attached to a spindle so as to be rotatable; a slider, having a length and a width, which has a first pad, having a magnetic head for reading/writing data onto/from said magnetic disk located substantially in a center of said slider width, and second pads; a suspension to provide said slider with a predetermined load, wherein a coefficient of friction between said slider and said magnetic disk is denoted by â€œ&mgr;â€ , the load is denoted by â€œwâ€ , an adsorption between said slider and said magnetic disk is denoted by â€œwsâ€ , and a frictional force between the slider and the magnetic disk is denoted by â€œfâ€ , said frictional force â€œfâ€  being equal to or smaller than â€œ&mgr;(w+ws)â€ ; a gimbal coupled to said suspension; and an actuator arm, to position said slider on the magnetic disk, attached to said suspension; wherein the second pads are separated from the magnetic disk to fly thereabove by an air flow caused by rotation of the magnetic disk, and when the slider is seek-positioned on a certain track on the magnetic disk by the actuator arm via the suspension, a frictional force exerted between said slider and said disk is equal to or smaller than a product of lateral stiffness of said suspension in a seeking and positioning direction and a track width.