Method and apparatus for storing and retrieving error check info

Details Method and apparatus for storing and retrieving error check info Method and apparatus for storing and retrieving error check info

1995-04-18

1997-05-13

Beausoliel, Jr., Robert W.

Excavating

39518507, 371 511, G01R 3128, G06F 1100

Patent

active

056300549

ABSTRACT:
A method and apparatus by which the partial error check value for all preceding data in a sector is updated each time a new data item is written into a data buffer during a transfer from a host computer to a system storage device. The partial check value is written into the buffer location following the location containing the most recently buffered data item from the associated sector. Thus, after the entire sector has been transferred into the buffer, the final check value for that sector will be available in the buffer location following the location containing the last written data from the associated sector. Upon readback of a sector from the storage device, the sector size is longer by one data item since the appended check value is treated as the last data item of the sector. When the sector is read back from the storage device, the check value is again updated with the entry of each data item. When the access is complete, the stored check value is compared with the newly-calculated value to determine whether an error has occurred. The present invention offers improved performance by eliminating some hardware and software elements needed to calculate and store the check value for a sector.

REFERENCES:
patent: 3887901 (1975-06-01), Moore
patent: 4450561 (1984-05-01), Gotze
patent: 4667326 (1987-05-01), Young
patent: 5134619 (1992-07-01), Henson et al.
patent: 5191584 (1993-03-01), Anderson
patent: 5195100 (1993-03-01), Katz et al.
patent: 5212785 (1993-05-01), Powers et al.
patent: 5214778 (1993-05-01), Glider et al.
patent: 5233618 (1993-08-01), Glider et al.
patent: 5285451 (1994-02-01), Henson et al.
patent: 5361347 (1994-11-01), Glider et al.
patent: 5404454 (1995-04-01), Parks
patent: 5469453 (1995-11-01), Glider

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