Cabinet selection considerations

1. How to choose the cabinet correctly?

Since the installation includes network cables, telecommunication cables, and power cables, it is necessary to purchase hook-and-loop straps or toothed straps to effectively secure the cables in the cabinet in an orderly manner. It would be great if the cabinet had a cable management module that would allow cables to be secured directly in the vertical mounting rails. In either case, there should be enough fixing rings (to protect cables) on the upper and side walls inside the cabinet, and it is also possible to lift the bottom plate of the cabinet to facilitate wiring below.

Second, the cabinet grade

Although the cabinets look almost the same, there are several types of subdivisions according to their uses. The common ones are the cabinets for wiring and the cabinets for placing servers. The cabinets for wiring are generally used to place There are multiple terminal switches, so there will be a lot of network cables that need to be connected out, and it is not convenient to have a door for the cabinet, so this kind of cabinet looks more like a rack, and some cabinet manufacturers call this product a wiring rack; The cabinet where the server is placed must have a door and a lock to protect the valuable equipment inside, so more expensive routers and firewalls are generally placed in this kind of cabinet.

Take the server cabinet as an example, there are different grades: this is an ordinary server cabinet with glass doors, and there are four cooling fans in the server cabinet, which are installed on the top of the cabinet and are mainly used for ventilation and heat dissipation, providing good ventilation for the inside of the cabinet. In a constant temperature environment, the bottom of the cabinet is hollowed out for ventilation and heat dissipation. The heat dissipation effect of the servers on the top of this cabinet is very good, but the heat dissipation of the servers in the middle and lower parts is not ideal.

The above cabinet is a relatively high-end server cabinet, which is ventilated and dissipated through the dense air holes on the front and rear doors, so the air-conditioning air in the computer room can be well distributed around each server in the cabinet, and the cooling effect of the entire cabinet is good. Moreover, this kind of cabinet is made of exquisite materials, anti-corrosion and anti-rust, and its load-bearing capacity is relatively strong.

Cabinet selection

3. Factors that users should consider when purchasing cabinets

1. Reliable quality assurance

It is very important to choose a suitable server cabinet and wiring cabinet, a slight negligence may lead to huge losses. No matter which brand of product it is, quality is the first link that users should consider.

2. Bearing Guarantee

As the density of products placed in the cabinet increases, good load-bearing capacity is the basic requirement for a qualified cabinet product. Cabinets that do not meet the specifications may not be able to effectively and properly protect the equipment in the cabinet due to poor quality of the cabinet, and the result may affect the entire system.

3. Temperature control system

There is a good temperature control system inside the cabinet, which can avoid overheating or overcooling of the products in the cabinet, so as to ensure the efficient operation of the equipment. The cabinet can choose the fully ventilated series, and can be equipped with fans (the fan has a life guarantee), and an independent air conditioning system can be installed in a hot environment, and an independent heating and heat preservation system can be installed in a severe cold environment.

4. Anti-interference and others

A full-featured cabinet should provide various door locks and other functions, such as high anti-interference performance such as dustproof, waterproof or electronic shielding; at the same time, it should provide support for suitable accessories and installation accessories to make wiring more convenient and easy to manage ,save time and energy.

5. Power distribution system

How does the cabinet cope with the increase in power density? With the increasing trend of high-density IT installation in the cabinet, whether the cabinet can play its due role, the power distribution system has become a key link. Reasonable power distribution is directly related to the availability of the entire IT system, and is an important basic link for whether the entire system can exert its due performance, and this is also a problem that was ignored by many computer room managers in the past. Due to the miniaturization of IT equipment, the density of equipment installation in the cabinet is increasing. Taking a 7U blade server as an example, one blade server needs about 3kVA power distribution, and a 42U high cabinet may install as many as 8 blade servers. servers, the total demand for power distribution will reach 24kVA. This poses a serious challenge to the power distribution system in the cabinet. At the same time, the increase of input and output ports also puts forward high requirements on the reliability of power distribution system installation.

The design of a reasonable cabinet power distribution system should follow the principle of taking reliability design as the core, designing specifically for the cabinet system, and fully coordinating and seamlessly cooperating with the power distribution system. At the same time, the convenience of installation and intelligent management should be considered , strong adaptability, easy operation and maintenance. The power distribution system of the cabinet should bring the power supply closer to the load to reduce the failure points in the power supply path. At the same time, local and remote monitoring of load current and remote control of power distribution should be gradually realized, so that power distribution management can be included in the overall intelligent management system of the computer room.

6. Cable layout

What should I do if there is a problem with the cable? In a huge computer room, it is still difficult to walk through the numerous cabinets, let alone quickly find and repair the faulty line. Whether the overall solution for the cabinet is in place, and the management of cables in the cabinet will become one of the key links in the investigation.

From the perspective of the cables attached to the cabinets, in today's data centers, the cabinet configuration density is higher, more IT equipment can be accommodated, a large number of redundant accessories (such as Foshan electrical appliances, storage arrays, etc.) are used, and the equipment configuration in the cabinet changes frequently. Data lines and cables are added and removed at any time. Therefore, the cabinet must provide sufficient cable channels to allow cables to enter and exit from the top and bottom of the cabinet. Inside the cabinet, the laying of cables must be convenient and orderly, close to the cable interface of the equipment, so as to shorten the wiring distance; reduce the space occupied by cables, and ensure that the equipment is not disturbed by wiring during installation, adjustment, and maintenance. And ensure that the heat dissipation airflow will not be blocked by cables; at the same time, in the event of a fault, the equipment wiring can be quickly located.