Method of correcting read error in digital data processing syste

Details Method of correcting read error in digital data processing syste Method of correcting read error in digital data processing syste

1996-09-24

1998-06-16

Beausoliel, Jr., Robert W.

39518214, G06F 1100, G06F 1114

Patent

active

057684944

ABSTRACT:
In order to effectively avoid faulty or false read error corrections in a digital data processing system, a check is made to see if the number of data read retrials reaches a preset number whose value is less than the maximum number of data read retrials. This checking limits the number of routine runs which can pass through an execution step wherein a check for an uncorrectable error is conducted, to a value which is markedly lower than that of the prior art. Further, if the routine passes once through a flag setting step wherein a flag is set to a preset logic level in the event that an error correcting length exceeds a length of data retrieved from a memory, all checking for uncorrectable errors is by-passed. Hence, the possibility that an uncorrectable error will be erroneously detected an a correctable one is greatly reduced or eliminated.

REFERENCES:
patent: 3958220 (1976-05-01), Marshall
patent: 3984814 (1976-10-01), Bailey, Jr. et al.
patent: 4870643 (1989-09-01), Bultmann et al.
patent: 4916701 (1990-04-01), Eggenberger et al.
patent: 5231638 (1993-07-01), Fujiki
patent: 5267241 (1993-11-01), Kowal

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