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Native Command Queuing (NCQ) is among the advanced and most anticipated features introduced in the Serial ATA II: Extensions to Serial ATA 1.0 Specification, download available at http://www.serialata.org*. NCQ is a powerful interface/disc technology designed to increase performance and endurance by allowing the drive to internally optimize the execution order of workloads. Intelligent reordering of commands within the drive's internal command queue helps improve performance of queued workloads by minimizing mechanical positioning latencies on the drive. This paper will provide a basis for understanding how the features of NCQ apply to complete storage solutions and how software developers can enhance their applications to take advantage of Serial ATA NCQ thereby creating higher performance applications.
Further reading: NCQ whitepaper*
Note: PDF Files require Adobe Acrobat* Reader*
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