Enhanced MR offset with dynamic tuning range
June 12, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for disk drive alignment Method for writing a servo pattern Method using matched filters for determining head positioner micro-jog in hard disk drive employing magneto-resistive heads Seek optimization for disk files with side-by-side head Method and apparatus for storing position offset information on a hard drive assembly cylinder Servo-writing system for use in a data recording disk drive Method and apparatus for providing read and write skew offset information for a magneto-resistive head Method and apparatus for determining separation between read and write elements of a transducer Method and apparatus for providing read and write skew offset information for a magneto-resistive head Method of measuring the read-to-write offset in a disc drive having separate read and write elements InventorsApplicationNo. 10459996 filed on 06/12/2003US Classes:360/77.06, Reproduced data signal used for tracking360/31, MONITORING OR TESTING THE PROGRESS OF RECORDING360/76Azimuth or skewExaminersPrimary: Sniezek, Andrew L.Attorney, Agent or FirmInternational ClassesG11B005/596G11B027/36 AbstractA reader-to-writer offset for a head positioned over a track on a disc in a disc drive having a plurality of tracks is generated by using two iterations. A first iteration is used to determine a fine-tuning range that is used for a second iteration. The first iteration uses coarse steps of the reader across the track pitch to roughly determine OTC boundaries (which are used as the fine-tuning range). The fine-tuning range is determined by locating the point before the first valid reading (e.g., a VGA reading or BER reading with a rate that is less than the BER threshold) and by locating the point after the last valid reading. The second iteration uses fine steps of the reader across the track pitch to determine the actual OTC boundaries. The OTC boundaries are the first valid reading and the last valid reading that are made using the fine steps. | |
