Systems and methods for adjacent track interference based re-writing
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsEui Seok Hwang, Shaohua Yang
Life of this patent
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Abstract
Systems and method relating generally to data processing, and more particularly to systems and methods for confirming data validity. In one case, a system is disclosed that includes an adjacent track interference confirmation circuit. The adjacent track interference confirmation circuit is operable to receive an indication of an adjacent track interference; determine a causal connection between the adjacent track interference and a mis-alignment of a read head and a track on a storage medium from which a data set corresponding to the indication of the adjacent track interference is derived; and provide a re-write signal where even after reduction of the mis-alignment the indication of adjacent track interference repeats.
Claims20
A data processing system, the system comprising:
- an adjacent track interference confirmation circuit operable to:
- receive an indication of an adjacent track interference;
- determine a causal connection between the adjacent track interference and a mis-alignment of a read head and a track on a storage medium from which a data set corresponding to the indication of the adjacent track interference is derived;
- and
- provide a re-write signal where even after reduction of the mis-alignment of the read head and the track, the indication of the adjacent track interference repeats.
A data processing system, the system comprising:
- a position error calculation circuit operable to calculate a distance from a read head to the center of a track fro which a data set is derived;
- an adjacent track interference confirmation circuit operable to:
- receive an indication of an adjacent track interference;
- compare the distance from the position error calculation circuit with a threshold value;
- and
- provide a re-write signal where the distance from the position error calculation circuit is less than the threshold value.
A method for confirming data validity on a storage device, the method comprising:
- providing a read head disposed in relation to a track on a storage device;
- using a position error calculation circuit to calculate a distance from a read head to the center of a track from which a data set is derived;
- receiving an indication of an adjacent track interference based upon a data set derived form the track;
- comparing the distance from the position error calculation circuit with a threshold value;
- and
- re-writing the data set to the storage medium where the distance from the position error calculation circuit is less than the threshold value.
Dependencies are inferred from the claim text.