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Definition: U


(Unit) A unit of measurement (1.75") of the height of a rack-mounted device. Thus, a 1U product has a vertical measurement of 1.75"; 2U is 3.5"; 3U is 5.25" and so on. See rack mounted. See also U interface.




A Lot of Electronics in Only 1U
This Xtore Extreme storage server packs a lot of punch in a 1U case, including two CPUs and multiple drives and power supplies.