# What is au rack measurement?

## What is au rack measurement?

1.75 inches
A server rack unit, or U, is a unit of measurement used to describe the amount of equipment space a server rack has. A U is 1.75 inches or 44.45mm high. An 8u rack has 8 units of vertical server rack space. Note: Equipment can be more than 1U in size.

## How do you count Rack Units?

A “Rack Unit” is equal to 1.75″ in height. To calculate the internal useable space of a rack enclosure you would simply multiply the total amount of Rack Units by 1.75″. For example, a 44U rack enclosure would have 77″ of internal usable space (44 x 1.75).

How much space is 1U?

1U refers to a height of 1.75 inches or 4.445 cm. This is the space between the rack shelves that is available for device installation. The size of rack mountable devices is often specified in ‘U’ with a number. A one-rack device is a 1U, while a 2U device requires two rack units.

How many servers go in a rack?

Full Rack – A full rack of servers is equal to 42U or roughly 6 feet of racked servers. Half Rack – A half rack of colocation servers is equal to roughly 18U – 22U, or slightly over 3 feet of stacked servers.

### What is the size of a rack unit?

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. One U is 1.75 inches (44.45mm); the standard rack, at 19 inches, is 42U. Rack servers and other hardware designed to be rack-mounted are…

### How are the holes in a rack unit arranged?

The holes in the mounting flanges of racks are arranged in groups of three, and that three-hole grouping is also called a rack unit. Rack units for equipment is considered maximum dimensions. In practice, devices are often made slightly smaller than the specified U value to allow a little space.

Where can I find a rack unit in my home?

Although rack units got a birth in telecom, they are found literally everywhere today due to the proliferation of server and network equipment in businesses and even homes (commonly in theater room gear and dedicated network closets).

What kind of thread does a rack unit use?

Rack units are universally the same, but the type of thread can vary depending on the rack. Mounting rails can be No. 10-32 tapped (Unified Thread Standard), No. 12-24 tapped, metric M6 threaded or universal square holes.