System and method for improving head positioning
US8817410B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Sep 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for improving accuracy of head positioning using existing servo patterns are provided. In one embodiment, a method for improving read head positioning is provided that comprises: writing a series of tracks over a range of read offsets to be calibrated; measuring a set of raw track profiles from the series of tracks; sampling the set of raw track profiles at a series of signal amplitude levels; constructing a reference track profile from the set of sampled track profiles; calculating a set of read offset deltas from each sampled track profile; merging the sets of read offset deltas into a set of average read offset deltas; and converting the set of average read offset deltas into a read offset correction table. A similar method for improving disk write head positioning is also provided which utilizes such a read offset correction table to eventually create write offset correction table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.