Method and apparatus for efficient cyclical redundancy check (CR

Details Method and apparatus for efficient cyclical redundancy check (CR Method and apparatus for efficient cyclical redundancy check (CR

1996-08-22

1998-03-31

Hua, Ly

39518203, G06F 1100

Patent

active

057348154

ABSTRACT:
A method and apparatus are for maintaining a cyclic redundancy check (CRC) byte is described which eliminates additional input/output (I/O) transactions for the case when a write to a partial sector is required while the CRC byte is maintained for an entire sector. The method includes performing an XOR operation between the partial write data and the data it is to displace, and then performing an XOR operation between the old CRC byte associated with the sector and the result of the XOR operation between the partial write data and the data it is to displace.

REFERENCES:
patent: 5235601 (1993-08-01), Stallmo et al.
patent: 5337322 (1994-08-01), Wang et al.
patent: 5485598 (1996-01-01), Kashima et al.
patent: 5499337 (1996-03-01), Gordon
patent: 5594862 (1997-01-01), Winkler et al.
patent: 5613059 (1997-03-01), Stallmo et al.

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