How many U is a full rack? A typical full size rack is 42U, which means it holds just over 6 feet (180 cm) of equipment, and a typical “half-height” rack is 18–22U, which is around 3 feet (91 cm) high.
How deep are server racks? Most often measured in inches, the depth of a server rack will be between 0 and 50 inches. The most popular options include depths of 24 and 48 inches, but there are also a fair few 29-inch server racks for open-frames.
What does 6U rack mean? A 6U rack or cabinet can house equipment whose total height when placed into the rack is no more 10.5inches or 26.67cm (2.67m) with 1U=1.75inches or 44.45mm.
How many 4U servers are in a rack? A typical small server rack with a 4U rack height can hold one 4U rack server, which would be a perfect 7-inch fit, but it can also hold: Four 1U rack servers, requiring 1.75 inches of vertical space per server.