System for improving parity generation and rebuild performance
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United States of America Patent
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Apr 13, 2010
Grant Date -
Mar 3, 2005
app pub date -
Aug 25, 2004
filing date -
Aug 26, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual parity hardware architecture that enables data to be read from each sector only once and performs both the P parity and Q parity from the single data source. The Q parity calculator provides parallel processing capabilities so that multiple parity operations are performed on the same sector simultaneously. The dual parity hardware architecture provides flexibility in restoring data, generating parity, and updating parity for differing data sector sizes.
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