System and method for improving head positioning

摘要

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.

主权项

1. A method for calibrating a read offset for a read-write head, comprising:
writing a series of tracks onto a disk over a range of read offsets to be calibrated, wherein each track has a different offset with respect to a designated track on the disk; measuring a set of raw track profiles from the series of tracks, wherein each track in the series of tracks has a corresponding raw track profile in the set of raw track profiles, and the corresponding raw track profile comprises a series of signal amplitude measurements acquired at uncorrected read offsets; sampling the set of raw track profiles at a series of signal amplitude levels, thereby producing a set of sampled track profiles; constructing a reference track profile from the set of sampled track profiles; and calculating a set of read offset deltas for each sampled track profile in the set of sampled track profiles.