Fly Height Extraction System
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Accused Products
Abstract
A system and method for monitoring fly height between a magnetic recording medium and a transducing head. In a first exemplary embodiment, magnetic spacing change value is calculated using media noise on the recording medium (instead of prerecorded tones) to provide a broadband frequency distribution that results in improved Wallace equation accuracy. In a second exemplary embodiment, a magnetic spacing change value is acquired by any suitable method but is adjusted as necessary to reflect transducing head wear, thus providing a methodology for calculating changes in fly height by taking into account the signal loss that is attributable to wear. In this way, a basic understanding of the mechanism causing changes in magnetic spacing is achieved.
4 Citations
40 Claims
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1-10. -10. (canceled)
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11. A system for monitoring fly height between a magnetic recording medium and a transducing head, comprising:
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first means for calculating a magnetic spacing change value relative to the recording medium and the transducing head; and second means for adjusting said magnetic spacing change value as necessary to reflect transducing head wear. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21-30. -30. (canceled)
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31. A system for monitoring fly height between a magnetic recording medium and a transducing head, comprising:
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first means for sensing media noise on the recording medium; and second means calculating a magnetic spacing change value from the media noise, said second means being further adapted to adjust the magnetic spacing change value as necessary to reflect transducing head wear. - View Dependent Claims (32, 33, 34, 35, 36, 38, 39, 40)
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37. (canceled)
Specification