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PARAID: A Gear-Shifting Power-Aware RAID

Overview Reducing power consumption for server computers is important, since increased energy usage causes increased heat dissipation, greater cooling requirements, reduced computational density, and higher operating costs. For a typical data center, storage accounts for 27% of energy consumption. Conventional server-class RAIDs cannot easily reduce power because loads are balanced to use all disks even for light loads. The authors have built the Power-Aware RAID (PARAID), which reduces energy use of commodity server-class disks without specialized hardware. PARAID uses a skewed striping pattern to adapt to the system load by varying the number of powered disks.

Further White Paper Details
Publisher	University of California	File Format	PDF
Date Published	December 2006
Format	White Papers
Topics	RAID, Removable Storage

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