1U,2U,3U,4U chassis Panel, the meaning of U

"The Meaning of U"

"A shining debut. 1U a new generation of servers with thickness of only "--。 This sentence is often seen recently in ads on PC servers, but what does "U" mean here?

In fact, U is a unit that represents the external dimensions of the server and is an abbreviation for the units, and the detailed dimensions are determined by the American Electronics Association (EIA), the industry group.

The size of the server is required to maintain the proper size of the server to be placed on iron or aluminum racks. The rack has a fixed server screw hole, which is good with the screw hole of the server and fixed with screws.

The specified size is the width of the server (48.26cm=19 inches) and the height (multiples of 4.445cm). Due to the width of 19 inches, it is sometimes also required to meet this requirement of the rack called "19 inch rack".

The thickness is 4.445cm as the base unit. 1U is the 4.445cm,2u 1U twice times the 8.89cm. In other words, the so-called "1U PC Server", is the shape to meet EIA specifications, thickness of 4.445cm products. Products designed to be placed into a 19-inch cabinet are generally referred to as rack servers.