How do you calculate rack units? The total rack unit is measured from the middle of the rack’s top hole of the previous U space to the top hole of the current U space. Even though the spacing between the holes is 0.625”, the remaining 0.5” comes from the distance between the bottom hole to the top hole of a RU.
What is the size of 42U rack?
|Maximum External Height||External Width||External Depth|
|82.30 in. (2090 mm)||24.00 in. (610 mm) 27.3 in. (693 mm)||27.00 in. (690 mm) 34.40 in. (874 mm) 40.40 in. (026 mm) 43.40 in. (1102 mm) 48.40 in. (1229 mm)|
How many U are in a 7ft rack? the “U” in “42U” is stands for “rack units,” or “U-spaces,” which equal 1.75 inches. If you are investing in data center racks, the standard height is 48U (“7-foot rack”) or, on some occasions, 42U.
How many servers does a rack have? Ordinary servers are usually 3U high, meaning a rack theoretically can hold 14 servers. However, by reducing server height to 2U or 1U, a rack can hold 21 or 42 servers—increasing the processing power by 50% to 100% in the same floor space.