Method and apparatus for positioning a magnetic-recording head
AssigneeHGST Netherlands B.V.
InventorsKei Yasuna, Minoru Hashimoto, Thambirajah Suthasun
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Abstract
A method for positioning a magnetic-recording head. The method includes correcting amplitude of each burst signal of a plurality of burst signals read out with the magnetic-recording head from each respective burst pattern of a plurality of burst patterns. In addition, the method includes computing a deviation of the magnetic-recording head from a track based on corrected amplitudes of the plurality of burst signals. Moreover, the method includes positioning the magnetic-recording head on the track based on the deviation of the magnetic-recording head.
Claims8
A method for positioning a magnetic-recording head, said method comprising:
- correcting amplitude of each burst signal of a plurality of burst signals read out with said magnetic-recording head from each respective burst pattern of a plurality of burst patterns;
- computing a deviation of said magnetic-recording head from a track based on corrected amplitudes of said plurality of burst signals;
- and
- positioning said magnetic-recording head on said track based on said deviation of said magnetic-recording head, wherein said amplitude of each burst signal of said plurality of burst signals is corrected based on misalignment information that is obtained before said deviation of said magnetic-recording head is computed and related to said misalignment of each of said burst patterns perpendicular to said scanning direction and wherein said amplitude of each of said burst signals is corrected based on amplitude-characteristic information related to said relationship between a position in said burst patterns and said amplitudes of said burst signals and wherein said amplitude-characteristic information comprises said amplitude gradients of said burst signals read out from at least two positions interposing said position where said burst signals are read out with said magnetic-recording head in said burst patterns.
A method for positioning a magnetic-recording head, said method comprising:
- correcting amplitude of each burst signal of a plurality of burst signals read out with said magnetic-recording head from each respective burst pattern of a plurality of burst patterns;
- computing a deviation of said magnetic-recording head from a track based on corrected amplitudes of said plurality of burst signals;
- and
- positioning said magnetic-recording head on said track based on said deviation of said magnetic-recording head, wherein a correction quantity of said amplitude of each of said burst signals is obtained before each of said burst signals is read out with said magnetic-recording head.
Dependencies are inferred from the claim text.