Excavating
Patent
1996-06-24
1998-03-31
Beausoliel, Jr., Robert W.
Excavating
371 377, H02M 1300
Patent
active
057346631
ABSTRACT:
A method for correcting error bursts in data which are uncorrectable by an ECC in a communications channel in which no pointer is available or if available is not generated. The data is recorded in blocks preferably comprising subblocks. Parity cell syndromes are generated for each block during writing; and during reading these syndromes are analyzed to identify possible starting points of error burst locations. A trial correction is applied to the data in the uncorrectable block (or subblock), then verified whether successful using CRC. The correction is accepted as valid if and only if only one trial correction is verified as successful. The maximum number B of consecutive bytes in error correctable in a block is less than, the number N of bytes in each parity cell, and N-B is selected to limit the probability of miscorrection.
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IBM Tech. Disclosure Bulletin, "Internal Data Check Correction", vol. 32, No. 1, Jun. 1989.
Beausoliel, Jr. Robert W.
International Business Machines - Corporation
Klein Esther E.
Otto, Jr. Henry E.
Vales P.
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