nit) 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 (www.xtore-es.com) storage server packs a lot of punch in a 1U case, including two CPUs, multiple drives and multiple power supplies.