Method and apparatus with improved error correction and error in

Details Method and apparatus with improved error correction and error in Method and apparatus with improved error correction and error in

1987-08-31

1989-05-23

Pellinen, A. D.

Excavating

371 39, G06F 1110

Patent

active

048336793

ABSTRACT:
A method and apparatus is disclosed that is selectively conditionable, during read processing, to operate in normal or diagnostic on-the-fly mode or in normal or diagnostic deferred mode to correct errors in encoded uncorrected data in a disk storage device. During deferred mode operation, hardware in the disk storage device receives uncorrected data in real time and generates syndrome bytes which are decoded at the device into error pattern and error location information that is transmitted to a storage director. Circuitry is provided for retaining, if desired, error pattern and location information to facilitate identification of surface defects in the storage disk whether read processing was done on-the-fly or in deferred mode.

REFERENCES:
patent: 4494234 (1985-01-01), Patel
patent: 4504948 (1985-03-01), Patel
patent: 4525839 (1985-06-01), Nozawa et al.
patent: 4625273 (1986-11-01), Woffinden et al.
patent: 4706250 (1987-11-01), Patel
patent: 4733396 (1988-03-01), Baldwin et al.
patent: 4745604 (1988-05-01), Patel et al.

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