Method and apparatus with improved error correction and error information availability
US4833679A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.