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Conventional server-class RAIDs cannot easily reduce power because loads are balanced to use all disks, even for light loads.<\/jats:p>\n          <jats:p>We 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. By spinning disks down during light loads, PARAID can reduce power consumption, while still meeting performance demands, by matching the number of powered disks to the system load. Reliability is achieved by limiting disk power cycles and using different RAID encoding schemes. Based on our five-disk prototype, PARAID uses up to 34% less power than conventional RAIDs while achieving similar performance and reliability.<\/jats:p>","DOI":"10.1145\/1288783.1289721","type":"journal-article","created":{"date-parts":[[2007,11,15]],"date-time":"2007-11-15T14:26:02Z","timestamp":1195136762000},"page":"13","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":122,"title":["PARAID"],"prefix":"10.1145","volume":"3","author":[{"given":"Charles","family":"Weddle","sequence":"first","affiliation":[{"name":"Florida State University, Tallahassee, FL"}]},{"given":"Mathew","family":"Oldham","sequence":"additional","affiliation":[{"name":"Florida State University, Tallahassee, FL"}]},{"given":"Jin","family":"Qian","sequence":"additional","affiliation":[{"name":"Florida State University, Tallahassee, FL"}]},{"given":"An-I Andy","family":"Wang","sequence":"additional","affiliation":[{"name":"Florida State University, Tallahassee, FL"}]},{"given":"Peter","family":"Reiher","sequence":"additional","affiliation":[{"name":"University of California, Los Angeles, CA"}]},{"given":"Geoff","family":"Kuenning","sequence":"additional","affiliation":[{"name":"Harvey Mudd College, Claremont, CA"}]}],"member":"320","published-online":{"date-parts":[[2007,10]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"Proceedings of the 4th USENIX Conference on File and Storage Technology","author":"Adb","unstructured":"Adb -el-Malek, M., Courtright II, W. 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