Total power consumption of such storage system configuration is 2,755W = 2.76 kW. So here is example calculation for Storage Array HP 3PAR 7400 having two storage controllers and seven disk enclosures.Īnd following disks: 8x 400GB MLC SSD, 128x 300GB 15K and 40x 900GB 10K = 8 x 3.7W + 128 x 8W + 40 x 6.3W = 29.6 + 1024 + 252 = 1,305.6W
Below are typical power consumptions of modern disks. Disk enclosures are populated with disks. Disk Enclosures typically consumes 150-200W. Below storage controllers are disk enclosures. Typical mid-range storage array has two controllers but some arrays can have even more controllers. Storage controllers are usually rack-mount servers consuming around 200W each. Thanks to simple hardware architecture we can relatively easily calculate power consumption of storage array, The real know-how and differentiators are in storage array software (aka firmware, operating system). Although some mid-range Storage Arrays have custom ASICs they are usually build from commodity enterprise components.
