Slider fly control
AssigneeSeagate Technology LLC
InventorsJason W. Riddering, Wayne A. Bonin, Zine-Eddine Boutaghou
Life of this patent
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Abstract
A disc drive data storage system is disclosed that includes a disc storage medium having a disc surface. The system also includes an armature and a slider coupled to the armature. The slider supports a transducer head that communicates with the disc storage medium. The slider flies above the disc surface and positions the transducer head proximate the disc surface. Data representing a topography map of the disc surface is stored in a memory. A controller controls the fly height of the slider above the disc surface as a function of the topography map of the disc surface.
Claims19
A disc drive data storage system, comprising:
- a disc storage medium having a disc surface;
- an armature;
- a slider, coupled to the armature, supporting a transducer head for communicating with the disc storage medium, the slider is adapted to fly above the disc surface and to position the transducer head proximate the disc surface;
- a memory adapted to store data representing a topography map of the disc surface;
- and
- a controller, responsive to the memory, adapted to control a fly height of the slider above the disc surface as a function of the topography map of the disc surface, the fly height control is carried out independent of a sensed fly height feedback.
A method of controlling fly height of a slider in a disc drive, comprising steps of:
- (a) providing a fly height spacing between the slider and a disc surface;
- (b) actuating the fly height spacing as a function of a received fly height control signal;
- and
- (c) providing the fly height control signal as a function of a topography map of the disc surface and independent of a sensed fly height feedback.
A disc storage system comprising:
- a slider supporting a transducer head for communicating with a disc storage medium, the slider adapted to fly above a disc surface of the disc storage medium and to position the transducer head proximate the disc surface;
- and
- a controller means, responsive to the memory, adapted to control a fly height of the slider above the disc surface as a function of a topography map of the disc surface and independent of a sensed fly height feedback.
A disc drive data storage system, comprising:
- a disc storage medium having a disc surface;
- an armature;
- a slider, coupled to the armature, supporting a transducer head for communicating with the disc storage medium, the slider is adapted to fly above the disc surface and to position the transducer head proximate the disc surface;
- a memory adapted to store data representing a topography map of the disc surface;
- a controller, responsive to the memory, adapted to control a fly height of the slider above the disc surface as a function of the topography map of the disc surface;
- and
- a microactuator, coupled to the slider, that actuates the fly height of the slider in response to a fly height control signal provided by the controller,
- wherein the fly height control signal is a function of an average fly height value determined from a read signal amplitude and a topography map value for a location on the disc surface.
Dependencies are inferred from the claim text.