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Redundant Array of Independent Disks (RAID) technology is used to improve performance and availability of the underlying storage arrays for any application. With RAID implementations, performance is improved by distributing I/O across many physical disks and availability is increased with the data rebuilding capability. But both high availability and high performance comes at a price, which are different for different RAID implementations. Most of the time database and storage administrators ask the age-old question - whether to go with RAID 10 or RAID 5 for their database deployment. Customers struggle to make right tradeoffs between these two RAID implementations for their database deployments. This white paper evaluates different tradeoffs including performance, cost, and availability while evaluating RAID 10 compared to RAID 5.
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