It is very important to plan space reasonably in the equipment room. Many users do not understand the size of IU and 2U, and many people do not know how many hosts can be placed in the 42U cabinet that they often hear. Today, Xiaobian will take you to understand the measurement of server and cabinet.

1. how big is 1U?

In the limited space of the equipment room, how to properly plan and place these servers is a problem that the equipment room has been considering, because the equipment room needs to ensure that the server configuration is flexible and the computing density is high to place a large number of hosts. The rack host in the machine room is better than the tower server in terms of energy saving, maintenance cost and environment cost. The common 1U, 2U refers to the height of the server box/is a unit of the external size of the modular rack. The detailed size is determined by the eia, an industry group. 1U(short for unit) is equal to 4.45cm and 2U is equal to 8.9cm (2 x 4.45cm). Common server specifications include 1U, 2U, 3U, and 4U.

U is the rack structure for communication switching, which is later referenced to the server rack. Currently used as an informal standard in frame construction, including specified screw sizes, hole spacing, track markings, etc. 1U and 2U are the thickness of the server. 1U is roughly equivalent to three small grids of cabinets, and 1U is 4.445 centimeters.

2. What are the features and shortcomings of 1U server

1U has limited height and special requirements for accessories, which will increase the overall hardware cost and difficulty in choosing accessories. 1U server has a high availability, high density and low cost server platform, which is suitable for special applications and high density computer environments. The disadvantage is that the space of the 1U server is limited. Therefore, its scalability and heat dissipation capability are limited. Therefore, complete device expansion cannot be demonstrated. In contrast, the 2U server is moderately high and has significantly enhanced scalability (disk storage, expansion slots, and power supplies). Heat dissipation is also improved. The hosting cost of a 1U server is higher than that of a 2U server.

3. How many servers can the 42U cabinet hold?

The 42u cabinet contains 2 m, 0.6 m wide, and 0.96/0.8 m deep server cabinets. The number of servers in a 42 U cabinet is limited. 42U high cabinets can't actually fit 42 1U servers, because you have to make room for cooling and moving, and you have to consider power, overall cooling, etc. The upper and lower wiring should also be vacant, as well as the placement of switches, firewalls, monitors, etc. Therefore, a 42U standard cabinet can accommodate 18 20 servers.