What do servers 1u, 2u, 3u, 4u mean

This refers to the server size specification

1U=4.45cm 2U=4.45cm *2 3U=4.45cm * 3 4U=4.45cm * 4

This refers to the height of the server, and current servers are very flat to save space.

U is the height of the server chassis, 1U is equal to 4.45 cm, then 3U is 3x4.5CM.

With the rapid development of enterprise informatization, the demand for servers is also increasing. In the limited space of the computer room, how to plan and implement rationally, for us, must pay attention to these issues. Rack-mounted servers have advantages over tower-mounted servers in terms of saving energy costs, maintenance costs, and environmental costs because of their flexible configuration and high computing density. These advantages provide a broad development space for the construction of large and medium-sized information systems for 1U servers.

So what is a 1U server? The so-called 1U server is a high-availability, high-density, low-cost server platform designed specifically for special application industries and high-density computer environments. They can start their own operating systems through the local hard disk, such as Windows NT/2000/2003, Linux, Solaris, etc., similar to independent servers. In this mode, each motherboard runs its own system, serving different user groups specified, and is not related to each other. However, we can still use system software to assemble these motherboards into a server cluster.

u (abbreviation for unit) is a unit that represents the external dimensions of a modular rack. The detailed dimensions are determined by the Electronic Industries Association (eia), which is an industry group.

The required dimensions are width (48.26cm = 19 inches) and height (multiples of 4.445cm). Since the width is 19 inches, the racks that meet this requirement are sometimes called "19-inch racks." The basic unit of thickness is 4.445cm. 1u is 4.445cm, 2u is 2 times 1u to 8.89cm (and so on).

U is not a server patent. The earliest 7a686964616fe78988e69d8331333335306334 is a rack structure for communication exchange, which is back-referenced to the server rack. At present, it is used as a non-business standard on the frame structure, including the specified screw size, hole distance, railing, and so on.