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Definition: rack mounted


Built into a cabinet that has a standard width of 19" or 24". The height of a rack-mounted device is specified in units or rack units (U or RU), and 1U or 1RU is 1.75" from top to bottom.

All types of electronics and computing devices come in rack-mounted packages, including servers, test instruments, telecommunications components, storage drives and A/V equipment, which are bolted to the side frames of the rack. Shelves are available for equipment that is not rack mounted. See blade server.




Rack Mount Cabinet
This shows the variety of shelves available for AMCO 19" rack mount cabinets. A host of accessories, including side and rear panels, doors, locks and fans are available. (Image courtesy of AMCO Engineering Company.)






One, Two and Three Rack Units
Each rack unit (U) is 1.75" thick from top to bottom.






A Rack of Betacams
In datacenters and professional studios around the world, equipment is routinely rack mounted. These Betacam videotape recorders were in a TV studio, and each Betacam recorder took 5U of rack space.