Method and apparatus for recovering data

Details Method and apparatus for recovering data Method and apparatus for recovering data

1990-03-15

1993-02-23

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 62, G11B 509

Patent

active

051895668

ABSTRACT:
Disclosed is a method for recovering data from a portion of a magnetic surface that contained a read error. After a read error is encountered a magnetic transducer undergoes a head state change. The head state change is accomplished by either writing to a reserve area of the magnetic surface and or reading a portion of the magnetic surface and then rewriting to that portion of the magnetic surface. After the magnetic transducer undergoes a head state change, the portion of the magnetic surface that contained the read error is reread.

REFERENCES:
patent: 4089029 (1978-05-01), Castrodale et al.
patent: 4516165 (1988-05-01), Cunningham et al.
patent: 4821125 (1989-04-01), Christensen et al.
Patent Abstracts of Japan-Publication No. 62137772 Entitled "Reading Error Recovery Method for Magnetic Memory Subsystem".
Patent Abstracts of Japan-Publication No. 63155473 Entitled "Magnetic Disk Controller".
Patent Abstracts of Japan-Publication No. 01253802 Entitled "Magnetic Recording Device Having Read Error Recovery Function".
Patent Abstracts of Japan-Publication No. 02027572 Entitled "Alternate Processing System for Optical Disk Device".

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