Method and system for calculating single and dual parity for...

Details Method and system for calculating single and dual parity for... Method and system for calculating single and dual parity for...

2005-08-04

2008-08-12

Sough, Hyung (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

Reexamination Certificate

active

07412563

ABSTRACT:
A method of calculating single and dual parity for a networked array of storage elements is presented. The method includes deriving a first set of n relationships where each of the first set of n relationships consists of an XOR statement equaling zero. Each of the first set of n relationships contains n data symbols from n storage elements and one parity symbol from a first set of parity symbols. The method also includes deriving a second set of n+1 relationships where each of the second set of n+1 relationships consists of an XOR statement equaling zero, containing at least n−1 data symbols from at least n−1 storage elements and one parity symbol from a second set of parity symbols. Using both the first and second sets of derived relationships, scripts are generated to resolve unresolved symbols resulting from possible single- and dual-storage element failure combinations.

REFERENCES:
patent: 6453428 (2002-09-01), Stephenson
patent: 6675318 (2004-01-01), Lee
patent: 6694479 (2004-02-01), Murthy et al.
patent: 2003/0126522 (2003-07-01), English et al.
patent: 2003/0126523 (2003-07-01), Corbett et al.
patent: 2006/0129760 (2006-06-01), Subbarao

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