Server Tips

U is a unit that represents the external size of the server, and is an abbreviation for unit. The detailed size is determined by the Electronic Industries Association (EIA), an industry group.

The reason for sizing a server is to keep it sized to fit on an iron or aluminum rack.There are screw holes for fixing the server on the rack, so that it can match the number of the screw holes of the server, and then fix it with screws to facilitate the space required for each server to be installed.

The specified dimensions are the width (48.26cm=19 inches) and height (multiples of 4.445cm) of the server.Racks that meet this requirement are sometimes referred to as "19-inch racks" because they are 19 inches wide.The thickness is based on 4.445cm.1U is 4.445cm, 2U is 2 times of 1U is 8.89cm.

The so-called "1U PC server" is a product with a shape that meets the EIA specification and a thickness of 4.445cm.Products designed to fit into a 19-inch rack are generally referred to as rack servers.

1U server, 2U server, 4U server

The size specified by the server is the width (48.26cm=19 inches) and height (multiples of 4.445cm) of the server, and the thickness (height)) is based on 4.445cm.

Among the rack server sizes, the common ones are 1U servers, 2U servers, and 4U servers. The dimensions of these servers are:

1U=4.445cm

2U=4.445*2=8.89cm

4U=4.445*4=17.78cm

In actual use, 1U or 2U servers are the most frequently used.Because the service provider calculates the cost according to the space occupied by the server, the 1U server is the most space-saving and the cheapest, but the scalability of the 1U server is not as good as that of the 2U server.1U can have up to 4 hard drives, 2U can have 8, and the number of PCI slots is also different, 1U can have up to 2, and 2U can have up to 6.

Three types of servers can be divided into tower, rack, and blade servers through the structure of the server shape.At present, there are two common types of tower and rack servers on the market, so what is the difference between these two servers?

In appearance:

The appearance of the tower server is similar to the mainframe of our ordinary computer. It is vertical and can be placed anywhere without a cabinet.It's just that it's bigger, and its size is not uniform. If you want to say it, the height is generally 10U.(1U=4.45cm).

The shape of the rack type is flat, it is flat, the common height is 1U, 2U, it needs to be placed in the server cabinet.

Benefits:

The advantage of a tower server is that it has strong scalability, because it is larger in size and has a larger internal space, and there are many motherboard slots, which is conducive to the redundant expansion of hard disks and power lights in the later stage.Because of its good scalability and high configuration, this kind of server can meet the needs of general server applications, especially for common entry-level and work-level server applications.

The advantage of rack-mounted servers is that they take up less space and are convenient for unified management.Rack servers are designed to take up as little space as possible, so a lot of optimization will be done inside the machine.At the same time, its shape is designed according to the industry unified standard,

It can be conveniently placed in a cabinet for unified management.

The advantages of rack-mounted servers are high security and better performance. This is because rack-mounted servers need to be placed in cabinets, which are not accessible to ordinary people.

Cons:

The disadvantage of a tower server is that it is large and takes up a lot of space.If you need multiple tower servers, it will be inconvenient to manage, because its power cables, network cables, data cables, monitors, keyboards, mice, switches, and routers are not like rack servers.A messy situation.

The disadvantage of rack-mounted servers is that the internal space is relatively small, its expandability is limited, and the heat dissipation problem is limited.In terms of price, rack servers are generally more expensive than equivalent tower servers.

In general, these two types of servers have their own advantages and disadvantages, depending on the specific needs of the enterprise.But at present, the mainstream is the rack server, especially the server rental market.