Data recovery using targeted ECC correction

Details Data recovery using targeted ECC correction Data recovery using targeted ECC correction

1997-12-08

2000-07-04

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 25, G11B 509, G11B 502

Patent

active

060847344

ABSTRACT:
An apparatus for correcting read errors in a disk drive is disclosed. In one embodiment, the apparatus includes circuitry for determining that an undesired distortion exists in a data signal read from a surface of a data storage disk; circuitry for finding an approximate starting location of said distortion within said data signal; and, circuitry for correcting errors in said data signal caused by said undesired distortion using said approximate starting location of said distortion. A method for correcting read errors in a disk drive is also disclosed. In one embodiment, the method includes the steps of (1) providing an error correction code (ECC) that is capable of locating and correcting errors in a data signal; (2) determining that a data signal read from a surface of a data storage disk includes a distortion; (3) finding an approximate starting location of said distortion within said data signal; and, (4) performing error correction procedures on said data signal, based on said ECC, using said approximate starting location of said distortion.

REFERENCES:
patent: 5844920 (1998-12-01), Zook et al.
patent: 5917670 (1999-06-01), Scaramuzzo et al.

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