Excavating
Patent
1991-06-19
1993-12-07
Canney, Vincent P.
Excavating
371 381, G06F 1110
Patent
active
052689085
ABSTRACT:
The low-data-delay triple-coverage code for on-the-fly error correction apparatus allows on-the-fly error correction with fewer redundancy bytes than needed for a non-overlaid data redundancy structure thereby producing corrected data with a low data delay. The present apparatus divides a received block of data into a plurality of fixed size sub-blocks with the last sub-block size being smaller than or equal to the fixed sub-block size. Three predefined error correcting code generator polynomials are used to accumulate redundancy values for the sub-blocks. At the end of each sub-block one of the three pre-defined error correcting code generator polynomials will have accumulated a redundancy value across the present sub-block data and the previous two sub-blocks of data and redundancy. After the accumulated redundancy has been output as write data the predefined error correcting code generator polynomial is reset. Therefore, the redundancy information contained in each sub-block covers that sub-block's data in addition to the data and redundancy in the previous two sub-blocks.
REFERENCES:
patent: 4494234 (1985-01-01), Patel
patent: 4525838 (1985-06-01), Patel
patent: 4706250 (1987-11-01), Patel
Baker Dennis L.
Dudley Trent O.
Glover Neal
Hieb David R.
Canney Vincent P.
Storage Technology Corporation
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