A rack unit abbreviated u or ru is a unit of measure defined as 1 3 4 inches 44 45 mm.
Standard server rack sizes.
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 42u rack is completely customizable and can handle even the heaviest loads up.
Server racks can range from 0 to 50 inches in depth but are commonly seen at 24 and 48 inch depths.
Server rack depth illustration of rack depth.
For example a 9u rack has a width of 19 inches for a standard rack and a height of 15 75 inches 1 75 multiplied by 9.
Newer server rack cabinets come with adjustable mounting rails allowing the user to place the rails at a shorter depth if needed.
So for example if you have 20 x 2u high servers you need to mount you will need a server rack that.
19 inch server racks can vary in qualities.
1u 2u 3u and so on.
With the exception of some legacy equipment monitors and keyboards most server and network equipment sold today is intended to be rack mounted.
A standard 19 inch server rack cabinet is typically 42u in height 600 millimetres 24 in wide and 36 inches 914 40 mm deep.
1u one rack unit is approximately 1 75 in height 2u is 3 5 in height and so on.