Tag 1u dimensions

What is 1U? – Explained, Plain and Simple

Often times when people are new to the rackmount server world, there is a lot of confusion with the industry standard height measurements. The term 1U specifies that the chassis of the server is of 1 Rack Unit Height measurement. This breaks down even easier with some simple math. Think back to algebra and look at the U as a variable meaning 1.75 inches. In this case, 1U would just mean 1 times 1.75 inches. Thus making the server 1.75 inches tall! Using algebra like this applies to the other measurements as well, a 2U (2 x 1.75) is 3.5 inches tall, a 3U (3 x 1.75″) is 5.25 inches, a 4U (4 x 1.75) is 7 inches.

Wha is 1U ?

Racks are also seperated into Rackmount U measurments. Leaving everything in U form makes life easier for everyone involved with using the server. Instead of having to remember heights in inches and grabbing a calculator when trying to fill a rack, a person knows that if their rack is 20U high they can put 20 1U servers in the rack.

Just remember, the U is only a variable and represents an easily calculatable height for any server you’re interested in.

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