Cable backboard whole cabinet server and cabinet management module for electronic transaction

By integrating the switch unit, RMC unit, and power supply unit through the cable backplane, the problems of poor signal quality and high management complexity of traditional rack servers are solved, achieving efficient space utilization and cost reduction, while improving the security of data transmission.

CN223899453UActive Publication Date: 2026-02-10SHAANXI IND VOCATIONAL & TECH COLLEGE
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Patent Information

Application Number
CN202520145439.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-21
Publication Date
2026-02-10
Estimated Expiration
2035-01-21

AI Technical Summary

Technical Problem

Traditional rack servers suffer from problems such as large backplane size, poor signal integrity, deteriorating signal quality, high management complexity, high production costs, and low data transmission security.

Method used

The system integrates switch units, RMC units, server node units, and power supply units using a cable backplane. High-speed interconnection between server nodes and switch units is achieved through the cable backplane. A rack management module is used to divide the network path into internal and external management paths, and the LLDP protocol is used for slot information management.

Benefits of technology

It achieves high-density server space utilization, reduces signal transmission loss and production costs, and improves data transmission security and management simplicity.

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Abstract

The utility model discloses a cable backboard whole cabinet server and a cabinet management module for electronic transaction, and relates to the field of computer hardware infrastructure. The cable backboard whole machine cabinet server comprises a machine cabinet body, and a cable backboard is fixedly arranged on one side of the machine cabinet body. According to the invention, the switch unit, the server node unit, the RMC unit and the power supply unit are integrated into one cabinet server, and the units are rapidly connected through the cable backboard. The technical problems that in the prior art, the number of management board interfaces of the whole cabinet server is large, and signal attenuation is too large are effectively solved, and then the technical effects that the system design complexity in the whole cabinet server is reduced, and the cost and risk during operation of the cabinet server are reduced are achieved. Meanwhile, through the network design between the cabinet management module and the computing nodes, the cable design in the cabinet is simplified, and the risk of mutual influence of data in the data transmission process is reduced.
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Description

TECHNICAL FIELD

[0001] The present application relates to the field of computer hardware infrastructure, and particularly relates to a cable backboard whole-cabinet server and cabinet management module for electronic transactions. BACKGROUND

[0002] With the rapid development of technologies such as the Internet, big data, cloud computing and artificial intelligence, data is growing explosively, and industries such as e-commerce need to process massive data and complex computing tasks, which have very high requirements for the computing power of servers. At the same time, the construction cost of data centers required for server erection is relatively high, and the space utilization of computer rooms is limited.

[0003] In recent years, cabinet servers have been increasingly widely applied in the field of electronic transactions. Compared with traditional frame servers, whole-cabinet servers have great advantages in TCO (English full name: Total Cost of Ownership, total cost of ownership). The cabinet server is a whole-cabinet server that integrates the cabinet and the server in the production process. From the system aspect, the cabinet server is a high-density server cluster that provides centralized power supply, heat dissipation, wiring and unified management.

[0004] However, the traditional cabinet server adopts a PCB backboard mode to connect each unit inside the cabinet, and the backboard size is large. When the server business network card rate reaches a certain rate, the PCB backboard has a long wiring, the signal integrity is reduced, and the risk is extremely high.

[0005] Secondly, the management of the slot information of the server node of the traditional cabinet server is obtained through the hard signal of the slot ID of the server node and the backboard, and then the management is performed through the communication between the cabinet management unit and the server node BMC, which requires an additional backboard connector, increasing the cost and design complexity.

[0006] Finally, the traditional whole-cabinet server cannot distinguish between the internal management path and the external management path, which easily causes maintenance difficulties, and the security in the data transmission process is relatively low. INVENTION CONTENTS

[0007] To solve the above problems of the traditional whole-cabinet server, the embodiments of the present application provide a cable backboard whole-cabinet server and cabinet management module for electronic transactions, which solve the technical problems of the management board interface of the existing whole-cabinet server, long wiring length, excessive signal attenuation and poor signal quality. In addition, in the slot ID acquisition of the whole-cabinet server, the technical problem of the traditional whole-cabinet server that requires an additional backboard connector, resulting in high production cost, is also solved. The efficient use of the space in the cabinet of the high-density whole-cabinet server is realized, and the technical effects of reducing the loss of signal integrity in the transmission process and reducing the technical cost are achieved.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] In a first aspect, embodiments of this application provide a cable backplane rack server for electronic transactions, comprising a rack body, multiple 1U slots fixedly disposed inside the rack body, a rack server fixed inside the rack body by the 1U slots, and a cable backplane fixedly disposed on one side of the rack body; the rack server includes a power supply unit, an RMC unit, a switch unit, and a server node unit; the RMC unit is connected to the power supply unit on one side, sharing at least one 1U slot inside the rack body, and is positioned above the switch unit and the server node unit; the other side of the power supply unit is connected to the server node unit; the server node unit is electrically connected to the switch unit through the cable backplane and is disposed in a 1U slot below the RMC unit and the power supply unit, and the server node unit includes multiple server nodes; the switch unit is electrically connected to the cable backplane and is disposed in a 1U slot below the RMC unit and the power supply unit.

[0010] In conjunction with the first aspect, in one possible implementation, the power supply unit includes at most two power supply frames; when the power supply unit includes one power supply frame, the power supply frame is electrically connected to the RMC unit; when the power supply unit includes two power supply frames, one power supply frame is electrically connected to the RMC unit, and the other power supply frame is electrically connected to the RMC unit via an adapter plate.

[0011] In conjunction with the first aspect, in the second possible implementation, the server node includes a central processing unit, a baseboard management controller, and a network interface card; the baseboard management controller is connected to the switch unit via a cable backplane for uplink communication and to the central processing unit for downlink communication; the network interface card is connected to the switch unit via a cable backplane for uplink communication and to the central processing unit for downlink communication.

[0012] In conjunction with the second possible implementation of the first aspect, in the third possible implementation, the server node further includes multiple fans: the multiple fans are respectively communicatively connected to the baseboard management controller; the multiple fans are disposed on the inner side of the server node's housing.

[0013] In conjunction with the first aspect, in the fourth possible implementation, the cabinet further includes external devices; wherein, the external devices include a data center leakage sensor, a cabinet temperature and humidity sensor, a cabinet leakage sensor, and a door catch; the data center leakage sensor and the cabinet temperature and humidity sensor are connected to the RMC unit via an RS485 line; the cabinet leakage sensor and the door catch are connected to the RMC unit via I / O port wiring.

[0014] Secondly, embodiments of this application provide a rack management module for a cable backplane rack server, including an external network, an out-of-band management switch, an internal management path, an external management path, an RMC unit, and a server node unit. The internal management path includes multiple internal interfaces and communication paths between these interfaces. The internal interfaces include an RMC unit internal interface, an out-of-band management switch internal interface, and a server node unit internal interface, with the RMC unit internal interface communicatively connected to the out-of-band management switch internal interface and the out-of-band management switch internal interface communicatively connected to the server node unit internal interface. The external management path includes multiple external interfaces and communication paths between these interfaces. The external interfaces include an RMC unit external interface, an out-of-band management switch external interface, and a server node unit external interface, with the external network communicatively connected to the out-of-band management switch external interface and the out-of-band management switch external interface communicatively connected to both the RMC unit external interface and the server node unit external interface.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0016] This application provides a cable backplane rack server for electronic transactions. By integrating the switch unit, RMC unit, server node unit, and power supply unit into the same rack server, it solves the technical problem of signal quality degradation caused by the numerous management board interfaces and long cable lengths in existing rack servers. Furthermore, in terms of slot ID acquisition, it also solves the technical problem of high production costs caused by the need for additional backplane connectors in traditional rack servers. This achieves efficient utilization of rack space in high-density rack servers and reduces signal integrity loss during transmission, thus lowering technical costs.

[0017] Meanwhile, this application embodiment also employs a rack management module, which effectively solves the technical problem of low security in data transmission management of rack servers in the prior art by dividing the network of the switch unit, RMC unit, and server node unit into internal rack management path and external rack management path according to the access path. This achieves the technical effect of isolating internal rack data and external rack data and preventing internal and external data from affecting each other during transmission. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A node distribution diagram of a rack server with a cable backplane provided in an embodiment of this application;

[0020] Figure 2 A configuration diagram of the power supply unit provided in an embodiment of this application;

[0021] Figure 3 A management topology diagram of the power supply unit by the RMC unit provided in the embodiments of this application;

[0022] Figure 4 This application provides an embodiment of the management topology diagram of the RMC unit for external devices.

[0023] Figure 5 A structural diagram of the networking and logical scheme of a cable backplane rack server provided in an embodiment of this application;

[0024] Figure 6 This is an overall architecture diagram of the cabinet management module provided in the embodiments of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] Figure 1 This is a node distribution diagram of the cable backplane rack server provided in the embodiments of this application, such as... Figure 1 As shown, this application embodiment provides a cable backplane rack server, including a rack body, multiple 1U slots fixedly disposed inside the rack body, a rack server fixed inside the rack body by the 1U slots, and a cable backplane fixedly disposed on one side of the rack body.

[0027] The rack server includes a power supply unit, an RMC (Rack Management Controller) unit, a switch unit, and server node units.

[0028] The RMC unit is connected to one side of the power supply unit, shares at least one 1U slot inside the cabinet, and is located above the switch unit and server node unit.

[0029] The other side of the power supply unit is connected to the server node unit.

[0030] The server node unit is electrically connected to the switch unit via a cable backplane and is located in a 1U slot below the RMC unit and the power supply unit. The server node unit has multiple server nodes.

[0031] The switch unit is electrically connected to the cable backplane and is located in a 1U slot below the RMC unit and the power supply unit.

[0032] This application provides a cable backplane rack server for electronic transactions. By integrating the switch unit, RMC unit, server node unit, and power supply unit into the same rack server, it solves the technical problem of signal quality degradation caused by the numerous management board interfaces and long cable lengths in existing rack servers. Furthermore, in terms of slot ID acquisition, it also solves the technical problem of high production costs caused by the need for additional backplane connectors in traditional rack servers. This achieves efficient utilization of rack space in high-density rack servers and reduces signal integrity loss during transmission, thus lowering technical costs.

[0033] In this embodiment, the cabinet contains 47 1U slots, numbered 1 to 47, where U is an abbreviation for Unit, a unit representing the external dimensions of a server. The 1U slots are used for the mechanical mounting of the power supply units, switch units, and server node units within the cabinet. The cable backplane is used for high-speed interconnect cabling between the server node units and the switch units, as well as for out-of-band management cabling of the switch units.

[0034] The power supply unit is located at the top of the cabinet interior and is electrically connected to the cable backplane. It occupies 1U slots 45, 46, and 47 on the cable backplane. The power supply unit provides power to all servers in the rack.

[0035] Figure 2 This is a configuration diagram of the power supply unit provided in an embodiment of this application. Figure 2As shown in this embodiment, the number of power supply frames in the power supply unit of the rack server can be flexibly configured based on actual needs, with a maximum of two power supply frames. When the power supply unit includes one power supply frame, the power supply frame is electrically connected to the RMC unit. When the power supply unit includes two power supply frames, one power supply frame is electrically connected to the RMC unit, and the other power supply frame has an adapter board at the rear, which is electrically connected to the RMC unit via a power management cable.

[0036] When the power supply unit is configured with two power supply frames, the total number of power supply units (PSUs) in the rack server is 36. Each PSU has a maximum output power of 3.5kW, and each power supply frame supports a maximum of 17+1 PSUs, with a maximum supported power of 59.5kW. It also supports the failure of a single PSU; when a single PSU in a power supply frame fails, it does not affect the operation of other PSUs.

[0037] When two power supply racks are configured, and a single power supply unit in each rack fails, a total of 34 power supply units operate normally, with the rack server's maximum output power being 119kW. This maximizes the fulfillment of the application requirements of the rack server.

[0038] It should be noted that each power supply unit's power grid theoretically supports a minimum of one power supply unit.

[0039] like Figure 1 As shown in the illustration, this application also provides an RMC unit. The RMC unit is located at the top of the cabinet interior and connected to one side of the power supply unit, without occupying a separate 1U cable tray. The RMC unit is used to implement internal management functions for the entire rack server. Simultaneously, the RMC unit is also used to detect the operating status and number of power supply units within the power supply unit.

[0040] Specifically, the RMC unit writes the maximum number of power supply units that each power supply frame can support. When the number of power supply units exceeds this maximum number, the RMC unit alarms and generates alarm information to notify the user.

[0041] Figure 3 This is a management topology diagram of the power supply unit by the RMC unit provided in an embodiment of this application. Figure 3As shown, when the RMC unit manages the first power supply frame (power supply frame 1), it connects to the first power supply frame via the CANBUS bus through the RMC unit's built-in backplane connector. When the RMC unit manages the second power supply frame (power supply frame 2), it connects through the adapter board panel wiring of the second power supply frame. The adapter board connects to the power supply unit inside the second power supply frame through the backplane wiring, enabling the RMC unit to manage the power supply unit within the second power supply frame.

[0042] Figure 4 This is a management topology diagram of the RMC unit for external devices provided in an embodiment of this application. For example... Figure 4 As shown, the RMC unit is also used to establish connections with internal and external devices within the cabinet and to manage these external devices. These external devices mainly include a data center leakage sensor, a cabinet temperature and humidity sensor, a cabinet leakage sensor, and a door catch. The data center leakage sensor detects whether there is leakage in the data center where the server rack is located; the cabinet temperature and humidity sensor monitors real-time temperature and humidity changes inside the server rack; the cabinet leakage sensor detects whether there is leakage inside the server rack; and the door catch manages the opening and closing of the cabinet door.

[0043] The specific connectivity relationships include: the main management chip built into the RMC unit communicates with the data center leakage sensor and the rack temperature and humidity sensor via an RS485 cable. The main management chip also communicates with the rack leakage sensor and door catch via I / O interfaces. Through the RMC unit within the rack server, the management needs of the remaining components within the rack server are met to the greatest extent possible.

[0044] In terms of structural layout, to save effective space in the entire rack server, the RMC unit does not occupy a separate 1U rack slot, but shares the same height space within the rack with the power supply unit.

[0045] The switch unit is located inside the cabinet and is electrically connected to the cable backplane. Each switch unit occupies one 1U slot on the cable backplane, slots 21-25, and can accommodate a maximum of five switches. Slot 23 is the 1U slot used by the out-of-band management switch. Slots 21, 22, 24, and 25 are the 1U slots used by the service switches.

[0046] The switching unit provides service switching and out-of-band management network functions for rack-mount servers. Specifically, service switching functions are implemented by service switches, and out-of-band management network functions are implemented by out-of-band management switches.

[0047] The out-of-band management switch (TOS) establishes a TOR network over a virtual communication tunnel to enhance privacy and security on the internet. The TOS randomly places data on server nodes within the TOR network, and then the final node (the egress node) sends the traffic to the public internet, achieving high privacy and security during data transmission.

[0048] The server node unit is located inside the server rack and is electrically connected to the cable backplane. Each server node unit comprises multiple server nodes. It occupies 39 1U slots on the cable backplane: slots 1-20 and 26-44, with each slot corresponding to one server node. The server node unit provides the computing functions required by the service. Aside from some maintenance interfaces on the front panel, the server nodes have no other cable interfaces. High-speed connectors are provided on the mainboards of both the server nodes and the service switch. It should be noted that the server node unit can be blind-plugged into the cable backplane, meeting the requirements for easy installation and plugging / unplugging.

[0049] Figure 5 This is a structural diagram of the network and logical scheme of a rack-mount server with a cable backplane provided in an embodiment of this application. Figure 5 As shown, each server node includes a CPU (Central Processing Unit), a BMC (Baseboard Management Controller), a NIC (Network Interface Card), and multiple fans.

[0050] The server node's BMC baseboard management controller outputs via a GE (Gigabit Ethernet) interface. Uplink, it connects to the cable backplane via a high-speed connector, and then interconnects with the out-of-band management switch through internal circuitry within the cable backplane to meet out-of-band management requirements. Downlink, it communicates with the central processing unit.

[0051] Out-of-band management switches also communicate with the data center management network.

[0052] The NIC (Network Interface Card) connects to the cable backplane via a high-speed connector and then to the service switch via the internal circuitry of the cable backplane to transmit service data streams. A single SERDES (Serializer / Deserializer) can achieve a maximum speed of 56Gbps.

[0053] The fans can meet the air-cooling requirements of each server node. Unlike traditional centralized cooling, this application abandons the traditional technology of centralized cooling only for the entire server, which results in low cooling efficiency and cannot meet the cooling requirements of high-speed servers. The embodiments of this application further improve the cooling efficiency of each server node by placing the fans inside the casing of each server node and controlling the operation of the fans through the BMC.

[0054] It should be noted that each server node is powered by a centralized power supply unit within the rack server, which is capable of supplying 3000W.

[0055] The connection between each server node and each switch is completed through high-speed cabling. Based on user requirements, each server node is equipped with a high-speed connector, and all pins of the high-speed connector are used as output pins for high-speed signals, which can realize the interconnection between the server node and the switch. The maximum bandwidth during transmission meets user requirements, and the design is simple and the signal transmission rate is fast.

[0056] The cable backplane, as the core hardware of the rack server in this embodiment, communicates with the out-of-band management switch upstream and connects to the I / O (Input / Output) interfaces (such as RS485 and RS232 interfaces) of the rack peripherals downstream. The cable backplane mainly connects the switch unit and the server node unit.

[0057] Figure 6 This is an overall architecture diagram of the rack management module provided in an embodiment of this application. Figure 6 As shown in the figure, this application embodiment provides a rack management module for a cable backplane rack server.

[0058] Specifically, the rack management module includes two paths: the management path within the entire rack of servers, which mainly refers to the access and management of server nodes within the server node unit via the cable backplane; and the management path outside the entire rack of servers, which mainly includes the management of devices within the rack by the external data center network, as well as the access and management of server nodes within the rack by the external data center network.

[0059] In this embodiment, different management paths share the same physical port. The rack management module distinguishes between in-rack and out-of-rack management paths by dividing the out-of-band management switch and server nodes into in-rack VLANs (Virtual Local Area Networks) and out-of-rack VLANs. VLANs logically divide the modules within the local area network into multiple segments, with each VLAN equivalent to a broadcast domain (logical subnet). After setting up VLANs, modules in different VLANs cannot communicate with each other by default, ensuring more efficient and secure data exchange and communication within the VLAN.

[0060] This application embodiment employs a rack management module, which effectively solves the technical problem of low security in data transmission management of rack servers in the prior art by dividing the network of switch unit, RMC unit, and server node unit into internal rack management path and external rack management path according to the access path. This achieves the technical effect of isolating internal rack data and external rack data and preventing internal and external data from affecting each other during transmission.

[0061] In this embodiment of the application, the management of the server in the cabinet involves the slot ID of each server node, which needs to be presented to the user so that the user can take stock of the assets during the electronic transaction process. The slot information of the server node needs to be determined by binding LLDP messages and port information.

[0062] First, when clarifying the correspondence between switch port information and server nodes, it is necessary to ensure that the interconnection information of the port hardware is correct. Because server nodes may be incorrectly inserted during server production or on-site maintenance, an incorrect insertion detection mechanism is needed. Specifically, the operation steps of the incorrect insertion detection mechanism are as follows:

[0063] The first step is to install each physical device into its respective slot within the cabinet.

[0064] The second step is to write the pre-entered server slot information for each slot into the EEPROM under the server node, until all slots are traversed.

[0065] The third step is to power on the rack server and enable the out-of-band management switch's LLDP (Link Layer Discovery Protocol) function.

[0066] The fourth step involves the out-of-band management board running software to read the server slot information from the server node and compare it with the slot relationship information bound to the RMC unit to determine if they are consistent. If they are consistent, it proves that the cables between the server node and the out-of-band management switch are not plugged in incorrectly; otherwise, they are plugged in incorrectly, and the cable interconnection relationship is modified based on the prompt.

[0067] In the third step, LLDP provides a standard link-layer discovery method. The Layer 2 information obtained through LLDP allows for rapid acquisition of the topology status of connected devices. It displays the paths between clients, switches, routers, servers, and network servers, detects configuration conflicts between devices, and queries the causes of network failures. Users can use network management systems to monitor the link status of devices supporting the LLDP protocol and quickly locate faults when network failures occur.

[0068] After clarifying the server node and switch port information, the server slot information of the server node can be determined based on the port information bound by the BMC software in the cabinet. In this embodiment, the hardware slot information is transmitted and managed through the cabinet management module, saving physical signal transmission paths and simplifying hardware design.

[0069] This application provides a rack-mount server based on a cable backplane and a rack management module, simplifying and simplifying rack management and allowing for flexible expansion to manage other devices within the rack. By optimizing the connection between the cable backplane and other devices within the rack, the management module does not occupy interface slots within the rack, maximizing the available space for servers. By integrating fans into server blade nodes instead of providing shared fans, the space utilization within the rack is maximized. Management information for compute nodes is obtained via the LLDP protocol between the RMC unit, compute nodes, and out-of-band management switches, thus avoiding the use of additional cabling channels and minimizing signal quality loss during transmission. Furthermore, compute node slot information no longer uses separate hardware signals, reducing the number of signal cables within the rack and improving the effective use of space. By using a cable backplane, the link insertion loss between server nodes and switches is optimized, meeting the interconnection requirements within the rack.

[0070] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0071] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A cable backplane rack server for electronic transactions, characterized in that, Includes a server rack, multiple 1U slots fixed inside the server rack, a rack server fixed inside the server rack by the 1U slots, and a cable backplate fixed to one side of the server rack. The cabinet server includes a power supply unit, an RMC unit, a switch unit, and a server node unit; The RMC unit is connected to one side of the power supply unit, shares at least one 1U slot inside the cabinet, and is located above the switch unit and server node unit. The other side of the power supply unit is connected to the server node unit; The server node unit is electrically connected to the switch unit via a cable backplane and is located in a 1U slot below the RMC unit and the power supply unit. The server node unit includes multiple server nodes. The switch unit is electrically connected to the cable backplane and is located in a 1U slot below the RMC unit and the power supply unit.

2. The cable backplane rack server according to claim 1, characterized in that, The power supply unit includes at most two power supply frames; When the power supply unit includes a power supply frame, the power supply frame is electrically connected to the RMC unit; When the power supply unit includes two power supply frames, one power supply frame is electrically connected to the RMC unit, and the other power supply frame is electrically connected to the RMC unit through an adapter plate.

3. The cable backplane rack server according to claim 1, characterized in that, The server node includes a central processing unit, a baseboard management controller, and a network interface card; The baseboard management controller communicates with the switch unit via a cable backplane uplink and with the central processing unit downlink. The network interface card communicates with the switch unit via a cable backplane uplink and with the central processing unit downlink.

4. The cable backplane rack server according to claim 3, characterized in that, The server node also includes multiple fans: Multiple fans are individually connected to the baseboard management controller; Multiple fans are located inside the server node's casing.

5. The cable backplane rack server according to claim 1, characterized in that, The cabinet also includes external equipment; The external equipment includes a data center leakage sensor, a cabinet temperature and humidity sensor, a cabinet leakage sensor, and a door catch. The liquid leakage sensor in the computer room and the temperature and humidity sensor in the cabinet are connected to the RMC unit via an RS485 cable. The cabinet leakage sensor and door catch are connected to the RMC unit via I / O port wiring.

6. A rack management module for a server rack with cable backplane, characterized in that, This includes the external network, out-of-band management switch, internal management path, external management path, RMC unit, and server node unit; The management path within the rack includes multiple internal interfaces and the communication paths between these interfaces. The internal interfaces include the RMC unit internal interface, the out-of-band management switch internal interface, and the server node unit internal interface. The RMC unit internal interface is communicatively connected to the out-of-band management switch internal interface, and the out-of-band management switch internal interface is communicatively connected to the server node unit internal interface. The external management path of the rack includes multiple external interfaces and the communication path between each external interface; The external interfaces include the RMC unit external interface, the out-of-band management switch external interface, and the server node unit external interface. The external network communication is connected to the out-of-band management switch external interface, and the out-of-band management switch external interface is connected to the RMC unit external interface and the server node unit external interface, respectively.