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Glossary of Technical Terms

4 Post Server Rack



Rack mounting allows for servers, test instruments, telecommunications components, tape drives and audio and video equipment to be organized in a spacious yet rugged rack, with either two or four posts. The electronics and computing devices come in rack-mounted packages bolted to the side frames of the racks. If the electronics and computing devices are not rack-mountable, they can be placed on shelves that are also bolted to the side frames of the racks. Racks vary in size and shape but usually have a standard cabinet width of 19’’ or 23’’, and can be enclosed with or without sides. Server racks can use either two post or four post designs; it can be argued that the 4 post server rack design is more stable, which is of benefit when using heavy, expensive equipment. The four post design is also beneficial when moving the server rack on casters as all the racks will be supported by an extra two posts.