U (measurement)

This definition is part of our Essential Guide: Server form factors: A guide to rackmount, blade servers and more
Contributor(s): Tux Macauley

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.

This was last updated in April 2008

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