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Redundant Array of Inexpensive Disks (RAID) is the standard for large scale, fault-tolerant storage solutions. The various RAID levels combine space and/or performance optimization to meet the needs of the user. This paper introduces UPGRAID, which can be seen as a new RAID level built upon RAID5. The idea behind UPGRAID is that, by allocating a small amount of disk space for RAID stripe replication, substantial gains can be seen in both reducing response time during normal operation and reducing overall reconstruction time when a drive fails. This decrease is important as reconstruction is the most vulnerable time for a RAID5 system because another disk failure would render the array useless.

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Format:PDFSize:120 KB
Date:Aug 2007
Pages:4

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