Things To Know About Rack Servers

Rack servers are ideal choices for commercial as well as military applications. They require rugged computers with different configurations. The recognizable rack server, on the other hand, is the most common. These rugged, high-powered computers are suited for tough locations and projects that stress space conservation, scalability, upgradability, and expandability.

Server racks are one of the most vital parts of any data centre. They are available in a variety of models, each with a unique overall design. A 2-post or 4-post rack, as well as an enclosed cabinet or open-frame rack, can be used. Whatever type of rack is available, you can be confident that it will store numerous types of equipment that keep your organization running smoothly.

In this blog post, we’ll go over how a rack server works, the various sizes of rack servers and server racks, and how to pick the best of both for your program or application.

What is a rack server?

A rack server is a computer that can be installed in a rectangular framework. Also known as a rack-mount server, rack-mounted server, or rack-mount computer, this type of server is easier to maintain and diagnose computers. Rack server design permits technicians and operators to easily slide rack servers in and out. Some more benefits of server rack are:

  • improved space conservation
  • increased scalability
  • increased airflow when combined with a cooling system
  • ease of routine maintenance and diagnostics.

What is a rack server used for?

Rack servers, like all servers, offer clients data and unique services. They’re prevalent in data centers with dozens, if not hundreds, of server racks and rack cabinets.

Rugged rack servers are dependable, high-powered machines. These are stress-tested to withstand harsh environmental conditions such as extremely high or low temperatures, vibration during transport or operation, and humidity in parts of the world where atmospheric moisture is prevalent. A wide range of standards are certified for them, including MIL-STD-810H, CE, FCC, MIL-STD-461, and DO-160. For military applications be it inside small and strong MIL-STD-810-certified rack server enclosures or supporting an embedded computer application; these servers are used.

How does a rack server work?

Rack servers can be mechanically inserted and removed from server racks. This capability is useful because it allows system administrators to diagnose technical issues and hot-swap parts without having to shut down and disassemble the complete system. This capability is important for mission-critical systems and applications, when prolonged downtime could result in financial loss, harm, or even death.

Depending on the program or application, rack servers provide different performance, resources, and services. To support on-site computation and access to critical resources and intelligence, a remote military installation in the desert may require a high-powered rack database, email, web, file, or application server. A commercial warehouse or industrial oil rig may run a series of rack servers that store and process data from security cameras, assembly line computers, or fracking control systems.

 More about Rack Server

Because most rack servers are 19 inches wide, they can fit in the conventional 19-inch server rack layout.

Rack servers and server racks are typically measured by rack units. 1.75 inches equals one rack unit (U). The practice of determining how many rack mount servers a server rack can accommodate is known as server racking. When purchasing rackmount computers, the rack unit dimension is frequently stated as [number]U.

Simply multiply the rack unit number by 1.75 inches to get the height of your server or rack in inches. A rack server, for example, may have a 1U rack height, which equals to 1.75 inches of vertical space; hence, a rack must have at least 1U rack dimensions, or at least 1.75 inches of vertical space, in order for the rack server to fit properly.

Consider a rack server with 4U rack dimensions and 7 inches of vertical space. A compact server rack with a 4U rack height can contain one 4U server which is a suitable match for a 7-inch server. Moreover, it can also hold:

  • Four 1U rack servers, each requiring 1.75 inches of vertical space.
  • There are two 2U rack servers, each measuring 3.5 inches high.
  • There are two 3U rack servers and one 1U rack server, each taking up 5.25 inches and 1.75 inches vertically.
  • One 2U rack server and two 1U rack servers, with the 2U server requiring 3.5 inches of vertical space and each 1U server requiring 1.75 inches of vertical space.
  • Naturally, taller server racks exist than a 4U rack.

Other popular rack heights are 42U and 44U, which correspond to 73.5 and 77 inches of usable area, respectively. You could fit a variety of different-sized rack servers into these racks, or you could just use twenty-one 2U rack servers for the 42U rack and twenty-two 2U rack servers for the 44U rack.

Also Read: 6 Primary Features of Portable Monitors


Rack servers also known as rack mount servers are specially intended to be mounted in a structure called a rack. They are housed in mounting slots called bays and are fastened in place with screws. Rack servers are available in four sizes: 1U, 2U, 4U, and 8U.

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