A CDE Definition
Built into a cabinet that has a standard width of 19" or 24". All types of electronics and computing devices come in rack-mounted packages, including servers, test instruments, telecommunications components, tape drives and audio and video equipment. The units are bolted to the side frames. If equipment is not rack mountable, it can be placed on shelves. The height of a rack-mounted device is specified in a unit (U) measure or rack unit (RU). 1U (or 1RU) is 1.75" from top to bottom. See blade server.
Rack Mount Cabinet
One, Two and Three Rack Units
A Rack of Betacams
A server architecture that houses multiple server modules ("blades") in a single chassis. It is widely used in datacenters to save space and improve system management. Either self-standing or rack mounted, the chassis provides the power supply, and each blade has its own CPU, RAM and storage. Redundant power supplies may be an option. Blade servers generally provide their own management systems and may include a network or storage switch. Contrast with blade PC.
With enterprise-class blade servers, storage may be external, and the blades are diskless. This approach allows for more efficient failover because applications are not tied to specific hardware and a particular instance of the operating system. The blades are anonymous and interchangeable. In a hyperconverged datacenter architecture, the blade servers each have local storage (see hyperconverged infrastructure). See blade and processor area network.
Enterprise-Class Blade Server
Before/After Your Search Term
|R:BASE System||rack-mounted server|
|race condition||rad hardened|
|RACE encoding||RAD tool|
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