Standard Rack Size In U

A rack unit abbreviated as u less commonly seen as ru is a unit of measurement applied to equipment racks and the servers disk drives and other devices that they contain.

Standard rack size in u. Unlike height server rack depth is commonly measured in inches and has is much less variation in sizes. Newer server rack cabinets come with adjustable mounting rails allowing the user to place the rails at a shorter depth if needed. A standard 19 inch server rack cabinet is typically 42u in height 600 millimetres 24 in wide and 36 inches 914 40 mm deep. What is a u or rack unit.

Server rack depth illustration of rack depth. This three hole group is defined as a rack unit ru or sometimes just call a u. The industry standard for data centers the 42u universal server rack is compatible with a wide variety of servers and rack mountable networking equipment including dell hp austin hughes ibm kendall howard great lakes martin enclosures chatsworth and apc products. Server rack cabinet enclosures on the other hand can be a non standard 18u or 37u.

The picture courtesy of dell inc shows some of the dell poweredge servers and examples of different rackmount units. 19 inch server racks can vary in qualities. It is most frequently used as a measurement of the overall height of 19 inch and 23 inch rack frames as well as the height of equipment that mounts in these frames whereby the height of the frame or equipment is expressed as multiples of rack units for example a typical full size rack cage is 42u. So for example if you have 20 x 2u high servers you need to mount you will need a server rack that.

Each u or rack unit is equivalent of 1 75 and is used as the standard terminology for describing sizes with 19 inch rack cabinets. With the exception of some legacy equipment monitors and keyboards most server and network equipment sold today is intended to be rack mounted. Rack unit u or ru the hole spacing for standard 19 inch racks on the mounting flange is spaced in groups of three holes. The 1u 2u 3u 4u 5u 6u and 7u are all different sized rackmount servers and the u following the number is short for unit the number indicates the size of the rackmount 1u being the smallest rackmount and 7u being the biggest rackmount.

1u occupies 1 75 inches 44 45 mm of vertical space. 1u one rack unit is approximately 1 75 in height 2u is 3 5 in height and so on.