U

A U is a standard unit of measure for designating the height in computer enclosures and rack cabinets.

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 first published in April 2008

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