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Server Rack FAQ

What is a 19-inch Server Rack?

A 19-inch server rack is a standardized size frame or enclosure for mounting equipment.  Each piece of equipment has a front panel that is 19 inches wide.  To determine if your rack is a 19″ rack, measure the hole to hole spacing and it will measure 18.31 inches

What are the types of server racks available?

The most common types are:

  • Server Racks  or cabinet racks
  • Open Frame server  racks  - 4post racks
  • Relay racks - 2Post  racks
  • Portable server racks
  • Wall Mount racks

What is a Rack Unit (U or RU)?

The Rack Unit is a unit of measurement used for defining the vertical space available in an equipment rack.   A 'U' equals 1.75 inches or4.45cm. Rack-mountable equipment is usually designed to occupy an integer number of U. This dimension has been standardized by the Electronic Industries Alliance (EIA)

What are some common or standard server rack heights?

Server racks come in a wide variety of heights anywhere from 8U to 50U and above. To see the range of cabinet enclosure sizes Gaw Technology offers, please click here: Any customer defined sizes also available.

When are Four- post server racks used?

Four-post racks allow for mounting rails to support equipment at the front and rear. These racks may be open in construction or enclosed by front and / or rear doors, side panels, or tops.  Four-post racks can provide both robust support and security.

When are Two- post server racks used?

Two-post racks provide just two vertical posts. Equipment can be mounted either via its front panel holes, or close to its center of gravity, depending on the design of the rack. Two-post racks are most often used for telecommunication installations.

What are the Applicable Standards for Server Rack design and , manufacturing?

-The EIA-310

It is standardizing features like the Rack Unit, vertical & horizontal hole spacing,  rack openings and front panel width.

-IEC Standards

IEC 60297 (IEC 60297-3-100, -101, -102, -104, -105 and IEC 60297-5) standardize the dimensions and the mechanical structure of the 19 inch server rack.

What is the significance of the Server Rack Depth?

Server cabinet depth is important not only because it has to allow room for the depth of the particular equipment to be rack-mounted (deep servers vs.  routers or switches), but also it has to allow sufficient room for cables as well as airflow.

What options for front and rear doors are available for server racks?

Front as well as Rear doors are available in many different materials, sizes and with various ventilation options. Locking systems are also available on most doors. Choosing a ventilated front and rear door is key in air circulation by creating a front to back flow pattern.

What Server Rack Side Panel options are available?

The typical types of server cabinet side panels are: solid removable, solid fixed and louvered removable and fixed.

What is the most economical server rack cooling technique?

Our approach to efficient cooling of datacenter equipment begins with a sealed separation between the cold isle in front of the equipment row and the hot isle in the back of the equipment.  The sealing between hot and cold is done at the front rail level of the server racks.  We implemented this solution, for instance, for a wide variety of Cisco routers: 2821, 7613, 3560E, 3845, 2911, 6509E, 4507R, 4510R, 4510E, 4900M. 

Since the router is designed to intake cold air from the side, which is now left by our separation in the hot isle, we needed to create a duct that would connect the router's intake to the cold isle in front of the cabinet.  We accomplished the whole task by designing a cold air intake plenum mounted under the router, and connecting this plenum through a duct to the intake on the side of the router.

 Please call  us with your specific server rack requirements.


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