The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1998
Filed:
Oct. 15, 1996
Shih Mo, Milpitas, CA (US);
Stanley M Chang, Irvine, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A method and apparatus for reconstructing syndromes in a disk drive system. In the present invention, two levels of handling data errors are provided. The first attempt at correcting errors is performed by a dedicated error correction hardware. The error correction is based on a syndrome which was generated as a function of the data and ECC bits. An ECC code is selected such that the resulting syndromes produces a repeating, cyclical pattern. If the hardware correction circuit is unable to correct the error, the original syndrome value is reconstructed by processing the syndrome a number of times to where its current value in the next cycle corresponds to the original value in a previous cycle. This reconstructed syndrome is then used by the processor to handle the persisting error under firmware control.