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2.Why do we need Racks?
There are 2 main reasons why we use racks. The first is organization and safe keeping of equipment and the second is cost effective use of space in the location.
1. Organization and safe keeping of equipment: The equipment, which goes into a rack, is normally expensive or is controlling large amounts of data and cannot be interrupted. The rack offers the perfect solution to installing the equipment into a safe enclosure which will prevent un-authorized entry from individuals, protect the equipment from various environmental dangers, locate the equipment in easily identifiable locations for maintenance or upgrades and isolate the equipment from outside disturbances. Many equipments use large amounts of cable and connections. A rack is the best way to organize and control this mass of wires.
2. Cost effective use of space: There is an increasing trend to produce equipment, which is rack mountable. For example servers, used to be primarily the tower type, but since 1998, a growing number are of the thin (1U-2U) rack mount type. By installing all these equipments into a rack, you are able to reduce the amount of valuable space need to contain the equipment. A 42U rack can now hold up to 40 1U servers. Other equipment, which is joining the trend to rack mounting, includes, UPS, Storage devices, Routers, bridges hubs etc. Proper planning and installation of these equipments into a rack will greatly improve the space utilization of any site.
3.Types of Racks
There are many types of racks available today. We will look at 5 general types.
1. Server Type: The server type racks typically are 600 mm wide and at least 800 mm deep. New servers on the market are pushing the depth to 900 and up to 1000 mm deep and beyond. These racks will contain a high concentration of servers and support equipment. Normal heights are 42U and up for large applications. Server racks can be configured with a range of equipment, such as UPS, server, PABX, amplifier and basic network equipment for small office use. Data centers, ISP, ASP's are big users of server racks.
2. Telecommunications Type: These racks are commonly 800 mm wide and 800 to 900 mm deep. The extra depth will come if the user is installing deep servers into the rack. These racks are 800 mm wide because they will house more cable and wires than server racks. The routers and bridges have their cables connected in the front and these cables must be organized and guided to the base (or top) of the rack and then to the connection point. The width of 800 mm allows for the cables to be channeled along the sides of the rack. Telco's are big users of these racks.
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