Patent Number: 8,817,410

Title: System and method for improving head positioning

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.

Inventors: Moser; Andreas (San Jose, CA), Gee; Harold H. (San Jose, CA), Lambert; Steven E. (San Jose, CA), Mircea; Dragos I. (San Jose, CA)

Assignee: WD Media, LLC

International Classification: G11B 5/02 (20060101)

Expiration Date: 8/26/12018