Data center rack is a supporting framework used to hold hardware components like the server, hard disk drives, and other computing equipment. A rack enables the data center to hold multiple types of equipment in a small physical space without having shelves.
People often interchangeably use the terms “cabinet” and “rack”, but it is incorrect. The rack is totally different from the cabinet. While a rack is a frame specifically designed to provide a means for mounting electronic equipment, a cabinet is adapted with side panels and doors.
While rack comes in different shapes and size, the standard frame or enclosure size for the rack is 19-inch for mounting multiple equipment modules. All of the modules have a 19-inch wide front panel, that includes edges/ears which strike-out on each side that allow the module to be fixed to the rack frame with screws. Although, 23-inches is the ETSI (European Telecommunications Standards Institute) standard. The height of the 19-inch rack is typically 73.5 inches, therefore the size of the equipment designed to be rack-mounted is particularized in terms of rack units (U), usually 1.75 inches. A rack contains a number of mounting slots named as bays, all of them designed to hold a hardware unit secured in place with screws.
Rack-Mounted Servers Alternatives
The salient alternatives to rack-mounted servers are Tower Servers and Blade Servers. A cutting-edge technology called hyper-converged infrastructure involves a software-centric architecture which is firmly combined with computing, storage, networking, and virtualization resources within a single physical device.
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