U (measurement)
Contributor(s): Tux Macauley
This definition is part of our Essential Guide: Server form factors: A guide to rackmount, blade servers and more
A U is a standard unit of measure for designating the height in computer enclosures and rack cabinets. A U equals 1.75 inches. For example, a 4U chassis is 7 inches high. A 40U rack cabinet is 70 inches high.
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This was last updated in April 2008
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