Data block check sequence generation and validation in a file ca

Details Data block check sequence generation and validation in a file ca Data block check sequence generation and validation in a file ca

1994-04-26

1996-01-30

Beausoliel, Jr., Robert W.

Excavating

371 53, G06F 1134

Patent

active

054887020

ABSTRACT:
A system and method for detecting errors during the storage and retrieval of file information between a file cache system and a host computer system utilizes a block check sequence key as redundant data included in each block of file data transferred. The block check sequence key is generated by key generation logic and accompanies each block of file data stored in the file cache system by the host computer system. The block check sequence key is a compressed representation of the data within the selected block, as well as unique file and block identification information supplied by the requester of the write operation. When the block is retrieved from the file cache system, the system generates a new block check sequence key based on the data within the retrieved block and the unique file and block identification information supplied by the requester of the read operation. Validation logic ensures that if the retrieved key and the newly generated key does not match, an error signal is activated.

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John E. McNamara, "Technical Aspects of Data Communication", 1988, pp. 110-122.

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