HIERARCHICAL SECONDARY RAID STRIPE MAPPING
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Dec 31, 2007
filing date -
Dec 31, 2007
priority date (Note) -
Abandoned
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Abstract
Methods and apparatus of the present invention include new data and parity mapping for a two-level or hierarchical secondary RAID architecture. The hierarchical secondary RAID architecture achieves a reduced mean time to data loss compared with a single-level RAID architecture. The new data and parity mapping technique provides load-balancing between the disks in the hierarchical secondary RAID architecture and facilitates sequential access.
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