Method and apparatus for positioning a dual element magnetoresistive head
AssigneeInternational Business Machines Corporation
InventorsGordon J. Smith, Hal Hjalmar Ottesen
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Abstract
The present invention is a method and apparatus for positioning a dual element magnetoresistive (MR) head relative to a storage medium in a storage device. The MR head has first and second MR elements. The storage medium is mounted in the storage device to allow relative movement between the MR head and the storage medium. The storage medium includes servo information provided to induce first and second thermal responses in the MR elements. A controller is coupled to the MR head and controls the relative movement between the MR head and the storage medium using the first and second thermal responses in the MR elements.
Claims9
A disk for use in a storage device having a magnetoresistive (MR) head with two MR elements and a servo control system for positioning said MR head in response to thermal signals induced in said MR elements, comprising:
- a plurality tracks separated by track markers, said track markers being thermally detectable by said servo system.
A disk as recited in 6, wherein said sector markers have a width in the calibration track of 50-100 microns.
Dependencies are inferred from the claim text.