Hard disk backplane and server

Abstract

The utility model provides a kind of hard disk backboard and server, the hard disk backboard includes hard disk connection module, signal switching module and control module;The hard disk connection module includes at least one first connector, and the first connector is used to connect with hard disk;One end of the signal switching module is connected with the first connector, and the other end of the signal switching module is used to connect with the main control module and RAID module of the mainboard of the server;The control module is connected with the signal switching module, for controlling the signal switching module switches the first connector and the main control module or the RAID module connection.The utility model can realize NVMe hard disk group RAID without changing the connection mode of cable.

Description

Technical Field

[0001] This utility model relates to the field of hard disk technology, specifically to a hard disk backplane and server. Background Technology

[0002] The hard drive backplane connects the hard drive to the motherboard. With the increasing use of Trimode RAID cards, most motherboards, in addition to the CPU, also have a RAID card. RAID (Redundant Array of Independent Disks) cards support SATA, SAS, and NVMe protocols. In actual use, SATA and SAS hard drives connect to the motherboard's RAID card via connector 1, while NVMe hard drives connect to the motherboard's CPU via connector 2. When an NVMe hard drive needs to be configured in RAID mode, the cable connected to connector 2 must be connected to connector 1 to achieve RAID configuration. Replacing cables can cause various inconveniences, such as the fact that general maintenance personnel are not familiar with the internal hardware cable topology of the server, and the risk of damaging the server if the server is opened for cable replacement. Utility Model Content

[0003] This utility model provides a hard drive backplane and server, which aims to solve the problem of needing to replace cables when NVMe hard drives need to be configured into RAID via a RAID card.

[0004] In a first aspect, this utility model provides a hard drive backplane for use in a server. The hard drive backplane includes a hard drive connection module, a signal switching module, and a control module. The hard drive connection module includes at least one first connector for connecting to a hard drive. One end of the signal switching module is connected to the first connector, and the other end of the signal switching module is used to connect to the main control module and RAID module of the server's motherboard. The control module is connected to the signal switching module and is used to control the signal switching module to switch the connection of the first connector to the main control module or the RAID module.

[0005] Furthermore, the hard drive connection module also includes at least one second connector; one end of the second connector is connected to the RAID module, and the other end of the second connector is connected to the hard drive.

[0006] Furthermore, both the first connector and the second connector are also connected to the control module.

[0007] Furthermore, the control module is also connected to the main control module and the RAID module.

[0008] Furthermore, the hard drive backplane also includes an external connection module, which is connected to the main control module, the RAID module, the second connector, and the control module.

[0009] Furthermore, the external connection module includes a first external connector, a second external connector, and a third external connector; one end of the first external connector is connected to the main control module, and the other end of the first external connector is connected to the signal switching module; one end of the second external connector is connected to the RAID module, and the other end of the second external connector is connected to the signal switching module; one end of the third external connector is connected to the RAID module, and the other end of the third external connector is connected to the second connector.

[0010] Furthermore, the external connection module also includes a fourth external connector, one end of which is connected to the BMC module of the motherboard, and the other end of which is connected to the control module.

[0011] Furthermore, the first external connector, the second external connector, and the third external connector are all connected to the control module.

[0012] Furthermore, the hard drive backplane includes two of the first connectors and eight of the second connectors.

[0013] Secondly, this utility model also provides a server, the server including a motherboard and a hard disk backplane as described in any of the above.

[0014] The server disclosed in this utility model includes a motherboard and a hard drive backplane. The hard drive backplane includes a hard drive connection module, a signal switching module, and a control module. The hard drive connection module includes at least one first connector, which is used to connect to different types of hard drives. At the same time, the signal switching module is connected to the first connector, the main control module, and the RAID module. The control module is connected to the signal switching module and can switch the connection mode of the signal switching module. When the first connector is connected to a SAS hard drive or a SATA hard drive, the signal switching module switches the connection of the first connector to the RAID module. When the first connector is connected to an NVMe hard drive, the signal switching module can switch the connection of the first connector to the main control module or the RAID module. When the NVMe hard drive needs to be RAIDed through a RAID card, the signal switching module directly switches the connection of the first connector to the RAID module, so that NVMe hard drive RAID can be achieved without changing the cables. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the block shape of the hard disk backplate provided in the first embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the block shape of the hard disk backplate provided in the second embodiment of this utility model;

[0018] Figure 3 This is a block diagram of the hard disk backplate provided in the third embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of a high-speed signal connection of a hard disk backplane provided in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of a non-high-speed signal connection of a hard disk backplane provided in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the control module provided in one embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0025] Furthermore, the directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are only for reference to the accompanying drawings and the product's usage state. Therefore, the directional terms used are for explaining and understanding this invention, and not for limiting it. Additionally, in the accompanying drawings, structures that are similar or identical are indicated by the same reference numerals.

[0026] See Figures 1 to 5 , Figure 1 This is a block diagram of the hard disk backplane 100 provided in the first embodiment of this utility model; Figure 2 This is a block diagram of the hard disk backplane 100 provided in the second embodiment of the present utility model; Figure 3 This is a block diagram of the hard disk backplane 100 provided in the third embodiment of this utility model; Figure 4 This is a schematic diagram of the high-speed signal connection of the hard disk backplane 100 provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of a non-high-speed signal connection of a hard disk backplane 100 according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the control module 30 provided in one embodiment of the present invention. Figure 1 As shown, the hard drive backplane 100 includes a hard drive connection module 10, a signal switching module 20, and a control module 30; the hard drive connection module 10 includes at least one first connector 11, which is used to connect to the hard drive 200; one end of the signal switching module 20 is connected to the first connector 11, and the other end of the signal switching module 20 is used to connect to the main control module 310 and the RAID module 320 of the server's motherboard 300; the control module 30 is connected to the signal switching module 20 and is used to control the signal switching module 20 to switch the connection of the first connector 11 to the main control module 310 or the RAID module 320.

[0027] Specifically, the server may include a motherboard 300 and a hard drive backplane 100. The hard drive backplane 100 is used to connect the motherboard 300 and the hard drive 200 respectively, thereby realizing the connection between the hard drive 200 and the motherboard 300. The motherboard 300 may include a main control module 310 and a RAID module 320. The main control module 310 may be a CPU, and the RAID module 320 may be a RAID card. Both the main control module 310 and the RAID module 320 are connected to the hard drive backplane 100.

[0028] The hard drive backplane 100 may include a hard drive connection module 10, a signal switching module 20, and a control module 30. The hard drive connection module 10 is used to connect to the hard drive 200 and may include multiple different types of connectors, such as a first connector 11. The first connector 11 is used to connect to the hard drive 200, and the hard drive types connected to the first connector 11 may be multiple. Hard drive types include, but are not limited to, SAS hard drives, SATA hard drives, and NVMe hard drives. The first connector 11 can connect to SAS hard drives, SATA hard drives, and NVMe hard drives. Simultaneously, the first connector 11 is also connected to the signal switching module 20. The number of first connectors 11 may be multiple, specifically determined by the number of hard drives 200 that need to be connected.

[0029] The signal switching module 20 is used to switch the connection object of the hard drive backplane 100. The signal switching module 20 can be connected to the main control module 310 and the RAID module 320 of the motherboard 300. The signal switching module 20 can switch the connection object with the first connector 11 to the main control module 310 or the RAID module 320 according to the specific hard drive type. For example, when the hard drive type connected to the first connector 11 is of type 1, the signal switching module 20 switches the connection of the first connector 11 to the RAID module 320. When the hard drive type connected to the first connector 11 is of type 2, the signal switching module 20 can switch the connection of the first connector 11 to the main control module 310 or the RAID module 320. The type 1 can be a SAS hard drive or a SATA hard drive, and the type 2 can be an NVMe hard drive. When the NVMe hard drive needs to be configured into RAID through a RAID card, the signal switching module 20 switches the connection of the first connector 11 to the RAID module 320.

[0030] The control module 30 is connected to the signal switching module 20 and is used to control the connection object of the first connector 11 through the signal switching module 20. For example, when the hard drive connected to the first connector 11 is of type 1, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the RAID module 320. When the hard drive connected to the first connector 11 is of type 2, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the main control module 310 or to the RAID module 320. When the second type hard drive needs to be configured into RAID through a RAID card, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the RAID module 320.

[0031] The motherboard 300 may also include a BMC module 330 (Baseboard Management Controller). The BMC module 330 can interact with the control module 30 via the BMC I2C bus. The user can set whether the NVMe hard drive 200 is connected to the RAID module through the BMC module 330, for example, by writing the register value 0x01 or 0x00. The control module 30 switches the first connector 11 to be connected to the main control module 310 or to the RAID module 320 according to the instruction control signal switching module 20.

[0032] See Figure 2 As a further embodiment, the hard disk connection module 10 further includes at least one second connector 12; one end of the second connector 12 is connected to the RAID module 320, and the other end of the second connector 12 is connected to the hard disk 200. Further, the hard disk backplane 100 includes two first connectors 11 and eight second connectors 12.

[0033] The hard drive connection module 10 may further include at least one second connector 12. For example, the hard drive connection module 10 may include two first connectors 11 and eight second connectors 12, so that the hard drive backplane 100 can connect to ten hard drives 200. The second connectors 12 are used to connect to SAS hard drives or SATA hard drives, and the second connectors 12 are connected to the RAID module 320. That is, the SAS hard drives or SATA hard drives can be directly connected to the RAID module 320 through the second connectors 12.

[0034] The connection methods between the various modules within the hard drive backplane 100 can be divided into high-speed signal connection methods and non-high-speed signal connection methods. The aforementioned connection relationship is a high-speed signal connection method, and the non-high-speed connection method is described below.

[0035] In a further embodiment, both the first connector 11 and the second connector 12 are also connected to the control module 30. Furthermore, the control module 30 is also connected to the main control module 310 and the RAID module 320.

[0036] In the case of non-high-speed signal connection, both the first connector 11 and the second connector 12 are connected to the control module 30, and the control module 30 is also connected to the main control module 310 and the RAID module 320.

[0037] In a further embodiment, the hard drive backplane 100 further includes an external connection module 40, which is connected to the main control module 310, the RAID module 320, the second connector 12, and the control module 30. In a further embodiment, the external connection module 40 includes a first external connector 41, a second external connector 42, and a third external connector 43; one end of the first external connector 41 is connected to the main control module 310, and the other end is connected to the signal switching module 20; one end of the second external connector 42 is connected to the RAID module 320, and the other end is connected to the signal switching module 20; one end of the third external connector 43 is connected to the RAID module 320, and the other end is connected to the second connector 12.

[0038] The connection between the hard drive backplane 100 and the motherboard 300 can also be divided into high-speed signal connection and non-high-speed signal connection. For the high-speed signal connection, the first external connector 41 is connected to the main control module 310 and the signal switching module 20 respectively, the second external connector 42 is connected to the RAID card and the signal switching module 20 respectively, and the third external connector 43 is connected to the RAID card and the second connector 12 respectively.

[0039] like Figure 4 As shown, Figure 4 This is a schematic diagram of a high-speed signal connection. Figure 4CONN1 is the first external connector 41, CONN2 is the second external connector 42, CONN3 is the third external connector, CPLD is the control module 30, SW1 is the signal switching module 20, CPU is the main control module 310, and RAID card is the RAID module 320. CONN1 is connected to the CPU for transmitting PCIe signals, CONN2 is connected to the RAID for transmitting PCIe / SAS / SATA signals, and CONN3 is used for transmitting SAS / SATA signals. The PCIe x8 output from CONN1 is divided into two groups of PCIe x4 signals on the backplane. CONN2 outputs Lanex8 (indicating that connector 1 of the RAID card outputs 8 sets of high-speed signal lines, which can output corresponding signals NVMe / SATA / SAS depending on the connected device) which is also divided into two groups of Lanex4 on the backplane. The two PCIe x4 outputs from CONN1 are connected in pairs to the first connector 11 via SW1. SW1 is controlled by the CPLD, which can select whether the signal from the first connector 11 is connected to the CPU or the RAID card. The SAS / SATA signals from CONN3 are connected to eight second connectors 12 respectively, for connecting SAS / SATA hard drives.

[0040] As a further embodiment, the external connection module 40 further includes a fourth external connector 44, one end of which is connected to the BMC module 330 of the motherboard 300, and the other end of which is connected to the control module 30. Furthermore, the first external connector 41, the second external connector 42, and the third external connector 43 are all also connected to the control module 30.

[0041] For non-high-speed signal connection methods, the first external connector 41, the second external connector 42, the third external connector 43 and the fourth external connector 44 are all connected to the control module 30, and the first connector 11 and the second connector 12 are also connected to the control module 30.

[0042] like Figure 5 As shown, Figure 5 This is a connection diagram for non-high-speed signals. Figure 5 The main connection between the CPU and CPLD is via the CPU I2C BUS. This I2C is primarily used by the CPU to transmit indicator light signals for the NVMe hard drives to the CPLD, and by the CPLD to transmit the presence signal of the NVMe hard drives to the CPU. The RAID card and CPLD are connected via two CONNs (CONN2 and CONN3). The MISC signal mainly includes:

[0043] BP_TYPE: This is used to inform the RAID card whether the backplane is using SGPIO or 2-WireBus for management. If the CPLD sets the BP_TYPE signal to "0", it indicates that SGPIO is used for management; otherwise, it indicates that 2-WireBus is used. (Note: The 2-WireBus bus contains 2W-CLK clock lines, 2W-DATA data lines, and 2W-RESET reset signals; the SGPIO bus contains Sclock clock lines, Sload data frame start indicator signal lines, SDataIn data receive signal lines, and SDataOut data transmit signal lines.)

[0044] 2W-RESET / SDataOut: A multiplexed signal line for the 2W-RESET and SDataOut signals;

[0045] 2W-CLK / Sclock: A multiplexed signal line for the 2W-CLK and Sclock signals;

[0046] 2W-DATA / Sload: A multiplexed signal line for 2W-DATA and Sload signals;

[0047] PERST / SDataIn: Multiplexed signal line for PERST / SDataIn signals.

[0048] The BMC and CPLD are connected via the BMC I2C Bus. Users configure the settings through the BMC interface, and the BMC controls the CPLD through the I2C Bus to ultimately control the switching of SW1.

[0049] The first connector 11 and the second connector 12 are connected to the CPLD. The main MISC signals are P4 (ifDet# signal) and P10 (PRSNT# signal). The CPLD uses P4 and P10 to determine the presence and type of hard disk 200 (each connector has P4 / P10 connected to the CPLD).

[0050] If Det# = 1 and PRSNT = 1, it means the connector has no hardware connection.

[0051] If Det# = 0 and PRSNT = 0, it means that a SATA / SAS hard drive is connected.

[0052] If Det# = 0 and PRSNT = 1, it means that an NVMe hard drive is connected.

[0053] like Figure 6 As shown, Figure 6 The schematic diagram of control module 30 shows its workflow as follows:

[0054] A. Users configure the CPLD on the backplane based on whether they need to configure RAID for the NVMe hard drives.

[0055] When an NVMe hard drive needs to be configured for RAID, it can be set up through the BMC user interface. The BMC writes a value, such as "0x01", to a specific register of the CPLD via I2CBUS. The CPLD controls SW1 according to the register value, so that the PCIe signal of the NVMe hard drive is connected to the RAID card.

[0056] When the NVMe hard drive does not need to be configured for RAID, it can be set through the BMC user interface. The BMC writes a value, such as "0x00", to a specific register of the CPLD via I2CBUS. The CPLD controls SW1 according to the register value, so that the PCIe signal of the NVMe hard drive is connected to the CPU.

[0057] B. The CPLD configures the RAID card based on the values ​​written to specific registers.

[0058] When the value written to a specific register is "0x01", it means that RAID configuration is required for the NVMe hard drive. The CPLD controls the MISC signal in CONN2.

[0059] First, set the BP_TYPE signal to "0";

[0060] Then, D_INPL# is controlled according to the presence of the NVMe hard drive. When the NVMe hard drive is in place, the D_INPL# signal is controlled to be "0".

[0061] Finally, the CPLD decodes the 2W_CLK / 2W_DATA signals in CONN2 of the RAID card and controls the NVMe hard drive indicator lights according to the decoded information. At this point, the CPLD configuration is complete.

[0062] When the value written to a specific register is "0x00", meaning that RAID configuration of the NVMe hard drive is not required, the CPLD controls the MISC signal in CONN2:

[0063] Simply set the BP_TYPE signal to "1", and the remaining MISC signals in CONN2 do not need to be processed;

[0064] At this time, since the PCIe signal of the NVMe hard drive is connected to the CPU, after the NVMe hard drive is connected to the first connector 11, the CPLD controls the hard drive indicator light of the NVMe hard drive according to the CPUI2CBUS decoding information. At this time, the NVMe hard drive can directly perform read and write operations after the system completes the boot.

[0065] CONN3 also has a MISC signal connected to the CPLD. Since the high-speed signal of CONN3 does not need to be switched on the backplane but is directly connected to the second connector 12 of the SAS / SATA hard drive, when the CPLD only needs to set the signal BP_TYPE to "1", it only needs to decode the SGPIO signal issued by the RAID card to control the hard drive indicator light after detecting the SAS / SATA hard drive connection.

[0066] This utility model also provides a server, the server including a motherboard 300 and a hard disk backplane 100 as described in any of the above embodiments, the hard disk backplane 100 including a hard disk connection module 10, a signal switching module 20 and a control module 30; the hard disk connection module 10 includes at least one first connector 11, the first connector 11 being used to connect to the hard disk 200; one end of the signal switching module 20 is connected to the first connector 11, and the other end of the signal switching module 20 is used to connect to the main control module 310 and the RAID module 320 of the motherboard 300 of the server; the control module 30 is connected to the signal switching module 20, and is used to control the signal switching module 20 to switch the first connector 11 to connect to the main control module 310 or the RAID module 320.

[0067] Specifically, the server may include a motherboard 300 and a hard drive backplane 100. The hard drive backplane 100 is used to connect the motherboard 300 and the hard drive 200 respectively, thereby realizing the connection between the hard drive 200 and the motherboard 300. The motherboard 300 may include a main control module 310 and a RAID module 320. The main control module 310 may be a CPU, and the RAID module 320 may be a RAID card. Both the main control module 310 and the RAID module 320 are connected to the hard drive backplane 100.

[0068] The hard drive backplane 100 may include a hard drive connection module 10, a signal switching module 20, and a control module 30. The hard drive connection module 10 is used to connect to the hard drive 200 and may include multiple different types of connectors, such as a first connector 11. The first connector 11 is used to connect to the hard drive 200, and the hard drive types connected to the first connector 11 may be multiple. Hard drive types include, but are not limited to, SAS hard drives, SATA hard drives, and NVMe hard drives. The first connector 11 can connect to SAS hard drives, SATA hard drives, and NVMe hard drives. Simultaneously, the first connector 11 is also connected to the signal switching module 20. The number of first connectors 11 may be multiple, specifically determined by the number of hard drives 200 that need to be connected.

[0069] The signal switching module 20 is used to switch the connection object of the hard drive backplane 100. The signal switching module 20 can be connected to the main control module 310 and the RAID module 320 of the motherboard 300. The signal switching module 20 can switch the connection object with the first connector 11 to the main control module 310 or the RAID module 320 according to the specific hard drive type. For example, when the hard drive type connected to the first connector 11 is of type 1, the signal switching module 20 switches the connection of the first connector 11 to the RAID module 320. When the hard drive type connected to the first connector 11 is of type 2, the signal switching module 20 can switch the connection of the first connector 11 to the main control module 310 or the RAID module 320. The type 1 can be a SAS hard drive or a SATA hard drive, and the type 2 can be an NVMe hard drive. When the NVMe hard drive needs to be configured into RAID through a RAID card, the signal switching module 20 switches the connection of the first connector 11 to the RAID module 320.

[0070] The control module 30 is connected to the signal switching module 20 and is used to control the connection object of the first connector 11 through the signal switching module 20. For example, when the hard drive connected to the first connector 11 is of type 1, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the RAID module 320. When the hard drive connected to the first connector 11 is of type 2, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the main control module 310 or to the RAID module 320. When the second type hard drive needs to be configured into RAID through a RAID card, the control module 30 controls the signal switching module 20 to switch the connection of the first connector 11 to the RAID module 320.

[0071] The motherboard 300 may also include a BMC module 330 (Baseboard Management Controller). The BMC module 330 can interact with the control module 30 via the BMC I2C bus. The user can set whether the NVMe hard drive 200 is connected to the RAID module through the BMC module 330, for example, by writing the register value 0x01 or 0x00. The control module 30 switches the first connector 11 to be connected to the main control module 310 or to the RAID module 320 according to the instruction control signal switching module 20.

[0072] This utility model discloses a hard drive backplane and server that can switch the connection mode of the signal switching module according to the type of hard drive. When the hard drive connected to the first connector is a SAS hard drive or a SATA hard drive, the signal switching module switches the connection of the first connector to the RAID module. When the hard drive connected to the first connector is a RAID module, the signal switching module switches the connection of the first connector to the RAID module.

[0073] When using NVMe hard drives, the signal switching module switches the first connector to connect to the main control module or RAID module, thus enabling the connection of different types of hard drives without changing the cable.

[0074] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hard drive backplane, characterized in that, The hard drive backplane, used in servers, includes: A hard disk connection module, the hard disk connection module including at least one first connector, the first connector being used to connect to a hard disk; A signal switching module, one end of which is connected to the first connector, and the other end of which is used to connect to the main control module and RAID module of the server's motherboard; A control module, connected to the signal switching module, is used to control the signal switching module to switch the connection of the first connector to the main control module or the RAID module.

2. The hard disk backplane as described in claim 1, characterized in that, The hard disk connection module also includes at least one second connector; One end of the second connector is connected to the RAID module, and the other end of the second connector is connected to the hard drive.

3. The hard disk backplane as described in claim 2, characterized in that, Both the first connector and the second connector are also connected to the control module.

4. The hard disk backplane as described in claim 3, characterized in that, The control module is also connected to the main control module and the RAID module.

5. The hard disk backplane as described in claim 2, characterized in that, The hard drive backplane also includes an external connection module, which is connected to the main control module, the RAID module, the second connector, and the control module.

6. The hard disk backplane as described in claim 5, characterized in that, The external connection module includes a first external connector, a second external connector, and a third external connector; One end of the first external connector is connected to the main control module, and the other end of the first external connector is connected to the signal switching module; One end of the second external connector is connected to the RAID module, and the other end of the second external connector is connected to the signal switching module; One end of the third external connector is connected to the RAID module, and the other end of the third external connector is connected to the second connector.

7. The hard disk backplane as described in claim 6, characterized in that, The external connection module also includes a fourth external connector, one end of which is connected to the BMC module of the motherboard, and the other end of which is connected to the control module.

8. The hard disk backplane as described in claim 7, characterized in that, The first external connector, the second external connector, and the third external connector are all connected to the control module.

9. The hard disk backplane as described in claim 2, characterized in that, The hard drive backplane includes two first connectors and eight second connectors.

10. A server, characterized in that, Includes the motherboard and the hard drive backplate as described in any one of claims 1-9.

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