CN115390759A - A hard disk expansion system and its control method, device, and medium - Google Patents

Abstract

The application discloses a hard disk expansion system and a control method, a device and a medium thereof, comprising the following steps: the device comprises a control unit, a communication unit and a hard disk interface; the control unit is connected with the server through the communication unit to acquire a control instruction sent by the server through the virtual interface; the virtual interfaces are interfaces created based on the physical ports of the hard disks, the number of the virtual interfaces is consistent with that of the servers, and any hard disk in the system is communicated with each server through the virtual interfaces so that each server can read data in the hard disk; the control unit is connected with the hard disk port through the hard disk interface so as to exchange data with the hard disk according to the control instruction. According to the method and the device, the virtual interface is established based on the physical port of the hard disk, and the control unit is used for exchanging data with the hard disk according to the control instruction sent by the server through the virtual interface, so that each hard disk can be connected with a plurality of controllers, the situation that data in the hard disk cannot be read due to the failure of a single controller is prevented, and the stability and the reliability of the system are improved.

Description

A hard disk expansion system and its control method, device, and medium

technical field

The present application relates to the field of computer storage, in particular to a hard disk expansion system and its control method, device and medium.

Background technique

With the rapid development of cloud computing technology and Internet of Things technology, the amount of data that servers need to process is also increasing. In order to expand the capacity of the server storage system and ensure that the server can achieve high-speed data storage, most storage providers currently choose to connect the storage host of the server to an SSD hard disk expansion cabinet (Just a Bound Of Flash, JBOF) or HDD hard disk expansion cabinet.

The hard disk expansion cabinet and the storage host are connected through a high-speed serial computer expansion bus standard (peripheral component interconnect express, PCI-Express), and multiple hard disks are connected under JBOF to expand the disk array. However, because the PCIE bus is a tree topology, there can only be one root device, so the hard disk expansion cabinet can only be connected to one controller (the root device of the PCIE bus). When a controller fails, users will not be able to read the data in the hard disk expansion cabinet mounted on the controller.

It can be seen that how to provide a more secure and reliable hard disk expansion system to prevent the data in the JBOF from being unreadable due to the control of the controller is an urgent problem to be solved by those skilled in the art.

Contents of the invention

The purpose of this application is to provide a hard disk expansion system and its control method, device, and medium, so that each storage device (hard disk) in the storage system can be connected to the controllers of multiple servers, and prevent the hard disk from being damaged due to controller failure. Data cannot be accessed.

In order to solve the above technical problems, the application provides a hard disk expansion system, including:

Control unit, communication unit and hard disk interface;

The control unit is connected to the server through the communication unit, so as to obtain the control instruction sent by the server through the virtual interface; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of the virtual interface is the same as that of the server the same number;

The control unit is connected to the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control instruction.

Preferably, the communication unit includes a MINI SAS cable and a MINI SAS interface controller;

Each pair of MINI SAS interface controllers is respectively arranged on the server side and the control unit side, and establishes a PCIE bus connection based on the MINI SAS cable.

Preferably, the control unit is a PM42100 chip.

Preferably, the MINI SAS interface controller on the control unit side is connected to the control unit through an uplink interface of the control unit.

In order to solve the above technical problems, the present application also provides a hard disk expansion system control method, which is applied to the hard disk expansion system, and the method includes:

Obtain the control instruction sent by the server through the virtual interface, wherein the virtual interface is an interface created based on the physical port of the hard disk, and the number of the virtual interface is consistent with the number of the server;

Perform data exchange with the hard disk according to the control instructions.

Preferably, before the step of obtaining the control instruction sent by the server through the virtual interface, it also includes:

Create a shared namespace based on the storage space of the hard disk;

A connection relationship is created between the shared namespace and the virtual interface.

Preferably, after the step of creating a connection relationship between the shared namespace and the virtual interface, it further includes:

Binding each virtual interface of each hard disk to a downlink interface corresponding to each uplink interface of the control unit.

In order to solve the above technical problems, the present application also provides a hard disk expansion system control device, including:

An acquisition module, configured to acquire a control instruction sent by the server through a virtual interface, wherein the virtual interface is an interface created based on a physical port of a hard disk, and the number of the virtual interface is consistent with the number of the server;

The data exchange module is used for exchanging data with the hard disk according to the control instruction.

In order to solve the above technical problems, the present application also provides another hard disk expansion system control device, which includes a memory for storing computer programs;

The processor is configured to implement the steps in the method for controlling the hard disk expansion system when executing the computer program.

In order to solve the above technical problems, the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the described hard disk expansion system control method is implemented A step of.

The application provides a hard disk expansion system, the system includes: a control unit, a communication unit and a hard disk interface; the control unit is connected to the server through the communication unit to obtain the control instructions sent by the server through the virtual The interface created by the physical port, and the number of virtual interfaces is consistent with the number of servers. Any storage device in the system establishes communication with each server through the virtual interface, so that each server can read the data in the storage device; the control unit passes The hard disk interface is connected with the hard disk port, so as to exchange data with the hard disk according to the control command. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

In addition, the present application also provides a control method, device, and medium of a hard disk expansion system, which are applied to the above-mentioned hard disk expansion system, including: the control unit is connected to the server through the communication unit, so as to obtain the control command sent by the server through the virtual interface; , the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers. Any storage device in the system establishes communication with each server through the virtual interface, so that each server can read the data stored in the storage device. data; the control unit is connected to the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control command. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

Description of drawings

In order to illustrate the embodiments of the present application more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a structural diagram of a hard disk expansion system provided by an embodiment of the present application;

FIG. 2 is a structural diagram of another hard disk expansion system provided by the embodiment of the present application;

FIG. 3 is a flow chart of a hard disk expansion system control method provided by an embodiment of the present application;

FIG. 4 is a structural diagram of a hard disk expansion system control device provided by an embodiment of the present application;

FIG. 5 is a structural diagram of another hard disk expansion system control device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of this application.

The core of this application is to provide a hard disk expansion system and its control method, device, and medium, so that each storage device (hard disk) in the storage system can be connected to the controllers of multiple servers, and prevent the hard disk from being damaged due to controller failure. Data cannot be accessed.

In the working scenario of the storage system, in order to enhance the storage capacity and storage performance of the storage host, it is necessary to use JBOF to expand the storage host. The storage host and the JBOF are connected by cables (for example: SAS cables, MiniSAS cables, etc.), and multiple hard disks 3 are mounted on the JBOF. However, since the connecting cables use the PCIE protocol, each hard disk 3 can only communicate with a single server. In the controller connection, when the controller fails, the data in the hard disk 3 connected to the controller cannot be accessed. In order to solve this problem, the application provides a hard disk expansion system and its control method, device, and medium. The system includes: a control unit 1, a communication unit 2, and a hard disk interface, wherein the virtual interface is created based on the physical port of the hard disk. interface, and the number of virtual interfaces is consistent with the number of servers, any storage device in the system establishes communication with each server through the virtual interface, so that each server can read the data in the storage device; the control unit 1 communicates with the server through the hard disk interface The hard disk port is connected to exchange data with the hard disk 3 according to control instructions. The hard disk expansion system provided in this application obtains the control command sent by the server through the virtual port created based on the physical port of the hard disk, so that the control unit 1 can exchange data with the hard disk 3 through the hard disk interface according to the control command. This enables each hard disk 3 to be connected to multiple controllers, prevents the data in the hard disk 3 from being unreadable due to failure of a single controller, and improves the stability and reliability of the storage system.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific implementation methods.

Fig. 1 is a structural diagram of a hard disk expansion system provided by the embodiment of the present application. As shown in Fig. 1, the system includes:

Control unit 1, communication unit 2 and hard disk interface;

The control unit 1 is connected to the server through the communication unit 2, so as to obtain the control instruction sent by the server through the virtual interface; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers;

The control unit 1 is connected to the hard disk port through the hard disk interface, so as to exchange data with the hard disk 3 according to control instructions.

It should be noted that the hard disk 3 provided in this embodiment may be a mechanical hard disk (Hard Disk Drive, HDD) or a solid state disk (Solid State Drive, SSD), etc., which is not limited here. Furthermore, the solutions provided in this application can also be applied to other types of storage devices except hard disks.

It can be understood that, in order to facilitate the control unit 1 to control the hard disk 3, the hard disk 3 mounted in the hard disk expansion system provided in this embodiment is a hard disk supporting SR-IOV (Single Root I/O Virtualization). Further, the control unit 1 is connected to the hard disk 3 through the physical port of the hard disk 3. When the physical port of the hard disk is faulty, the server will not be able to read the data in the hard disk 3. In order to solve this problem and improve system stability, you can choose a hard disk with dual ports.

In a specific implementation, the control unit 1 may be an embedded controller, or an intelligent device such as a computer, which is not limited here. For example: choose the JBOF main board as the control unit 1, the JBOF main board includes the bus unit and the PAX chip, wherein the hard disk control program runs in the PAX chip to control the power-on, power-off, reset, and detection of the online status of the hard disk 3 And control the bus connection and communication.

The virtual interface is an interface created based on the physical port of the hard disk, and each virtual interface is connected to each server to ensure that the physical hard disk can be seen from the system of each server to obtain data on the hard disk 3 or write data to the hard disk 3. The system running in the server generates control instructions according to user operations, and sends the control instructions to the control unit 1 . The control unit 1 is connected to the physical hard disk 3 through a physical interface, wherein the control unit 1 is a signal chip selection chip to exchange data with the hard disk 3 according to control instructions.

This embodiment provides a hard disk expansion system, the system includes: a control unit, a communication unit, and a hard disk interface; the control unit is connected to the server through the communication unit, so as to obtain the control instructions sent by the server through the virtual interface; wherein, the virtual interface is The interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers, any storage device in the system establishes communication with each server through the virtual interface, so that each server can read the data in the storage device; control The unit is connected with the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control command. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

As a preferred embodiment, the present application also provides another hard disk expansion system. Figure 2 is a structural diagram of another hard disk expansion system provided by the embodiment of the present application. As shown in Figure 2, the system includes: four servers (HOST1, HOST2, HOST3, HOST4), the CPU of each server is connected to the JBOF with the hard disk mounted through the communication unit 2, so as to realize data exchange with the hard disk 3.

Further, the communication unit 2 is a bus communication unit, and each communication unit includes a first MINI SAS interface controller arranged at each server end, a cable, and a second MINI SAS interface controller arranged at the JBOF end. Each first MINISAS interface controller is connected to the CPU of the server, and each second MINI SAS interface controller is connected to the PAX main line in the JBOF mainboard to establish bus communication. As shown in Figure 2, the bus communication unit 2 in the device is a PCIE bus, wherein each PCIE bus has 4 channels (X4), and each channel has a receiving end and a sending end, and the two are differentially symmetrical.

The communication unit 2 includes a MINI SAS cable and a MINI SAS interface controller; each pair of MINI SAS interface controllers is respectively arranged on the server side and the control unit 1 side, and a PCIE bus connection is established based on the MINI SAS cable. Further, the control unit 1 is a PM42100 chip. The MINI SAS interface controller on the side of the control unit 1 is connected to the control unit 1 through the uplink interface of the control unit 1 .

In specific implementation, each JBOF motherboard in the system can mount up to 25 hard disks. The JBOF motherboard has 4 uplink interfaces, and each uplink interface is connected to the server host through MINI SAS HD external cables. Furthermore, in order to facilitate the connection between the JBOF motherboard and each hard disk, a backplane can also be provided in the hard disk expansion system, and the PAX chip is connected to each hard disk through the backplane.

The management software running in the PAX chip binds the four virtual interfaces of the hard disk to each uplink interface (UP STREAM PORT, USP) of the JBO F mainboard, and the management software in the PAX chip manages the hard disk 3 through the physical interface of the hard disk 3, based on the hard disk 3 to create a shared namespace (namespace), and bind the shared namespace to each virtual interface.

Fig. 3 is a flow chart of a hard disk expansion system control method provided in the embodiment of the present application. As shown in Fig. 3, the method is applied to the above-mentioned hard disk expansion system, including:

S10: Obtain the control command sent by the server through the virtual interface, wherein the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers;

S11: exchanging data with the hard disk according to the control instruction.

In the specific implementation, the management software in the PAX chip manages the hard disk through the physical interface of the hard disk, creates a shared namespace (namespace) based on the entire storage space of the hard disk, and binds the shared namespace to each virtual interface, so that each server Access the hard disk through a virtual interface.

The management software running in the control unit binds the virtual interfaces of the 25 hard disks to the downlink interfaces (DOWN STREAM PORT, DSP) of each JBOF uplink interface.

This embodiment provides a hard disk expansion system control method, which is applied to the above-mentioned hard disk expansion system. The system includes: a control unit, a communication unit, and a hard disk interface; the control unit is connected to the server through the communication unit, so as to obtain the control instructions; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers, and any storage device in the system establishes communication with each server through the virtual interface, so that each server can Read the data in the storage device; the control unit is connected with the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control instruction. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

As a preferred embodiment, before the step of obtaining the control command sent by the server through the virtual interface, it also includes: creating a shared namespace based on the storage space of the hard disk, and creating a connection relationship between the shared namespace and the virtual interface, so that each server can Establish a connection with the physical hard disk to prevent the data in the hard disk from being unreadable due to a single server failure.

Further, the MINI SAS interface controller on the control unit side is connected to the control unit through the uplink interface of the control unit. Therefore, after the step of creating a connection relationship between the shared namespace and the virtual interface, it also includes: connecting each virtual interface of each hard disk to The downlink interfaces corresponding to the uplink interfaces bound to the control unit. Specifically, through the management software running in the PAX chip in the control unit, the four virtual interfaces of each hard disk are bound to the downlink interfaces corresponding to the uplink interfaces of the PAX chip. The binding relationship is as follows: virtual interface 1 of the hard disk SSD1 is bound to the downlink interface 1 of the uplink interface, virtual interface 2 is bound to the downlink interface 1 of the uplink interface 2, virtual interface 3 is bound to the downlink interface 1 of the uplink interface 3, and virtual Interface 4 is bound to downlink interface 1 of uplink interface 4. By analogy, all the virtual interfaces of the hard disks are bound to the downlink interfaces corresponding to the uplink interfaces of the PAX chip.

In the above embodiments, the method for controlling the hard disk expansion system is described in detail, and the present application also provides corresponding embodiments of the control device for the hard disk expansion system. It should be noted that this application describes the embodiments of the device part from two perspectives, one is based on the perspective of functional modules, and the other is based on the perspective of hardware.

FIG. 4 is a structural diagram of a hard disk expansion system control device provided in the embodiment of the present application, which is applied to the above-mentioned hard disk expansion system. As shown in FIG. 4, the device includes:

The acquisition module 10 is configured to acquire the control instruction sent by the server through the virtual interface, wherein the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers;

The data exchange module 11 is used for exchanging data with the hard disk according to the control instruction.

Since the embodiment of the device part corresponds to the embodiment of the method part, please refer to the description of the embodiment of the method part for the embodiment of the device part, and details will not be repeated here.

In addition, the hard disk expansion system control device provided in the present application further includes: a connection creation module and an interface binding module. Wherein, the connection creation module is used for creating a shared namespace based on the storage space of the hard disk; and creating a connection relationship between the shared namespace and the virtual interface. The interface binding module is used to bind each virtual interface of each hard disk to the corresponding downlink interface of each uplink interface of the control unit.

This embodiment provides a hard disk expansion system control device, which is applied to the above-mentioned hard disk expansion system. The system includes: a control unit, a communication unit, and a hard disk interface; the control unit is connected to the server through the communication unit, so as to obtain the control instructions; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers, and any storage device in the system establishes communication with each server through the virtual interface, so that each server can Read the data in the storage device; the control unit is connected with the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control instruction. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

FIG. 5 is a structural diagram of another hard disk expansion system control device provided in the embodiment of the present application. As shown in FIG. 5 , the hard disk expansion system control device includes: a memory 20 for storing computer programs;

The processor 21 is configured to implement the steps of the method for controlling the hard disk expansion system in the above-mentioned embodiment when executing the computer program.

The smart device provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer or a desktop computer, and the like.

Wherein, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. Processor 21 can adopt at least one hardware form in Digital Signal Processor (Digital Signal Processor, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), Programmable Logic Array (Programmable LogicArray, PLA) accomplish. The processor 21 may also include a main processor and a coprocessor, the main processor is a processor for processing data in the wake-up state, and is also called a central processing unit (Central Processing Unit, CPU); Low-power processor for processing data in standby state. In some embodiments, the processor 21 may be integrated with a graphics processor (Graphics Processing Unit, GPU), and the GPU is used for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (AI) processor, and the AI processor is used to process calculation operations related to machine learning.

Memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory, and non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, the relevant steps of the hard disk expansion system control method disclosed in any of the above-mentioned embodiments can be realized. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be temporary storage or permanent storage. Wherein, the operating system 202 may include Windows, Unix, Linux and the like. Data 203 may include, but is not limited to, control instructions sent by the server through the virtual interface.

In some embodiments, the hard disk expansion system control device may further include a display screen 22 , an input/output interface 23 , a communication interface 24 , a power supply 25 and a communication bus 26 .

Those skilled in the art can understand that the structure shown in FIG. 5 does not constitute a limitation to the hard disk expansion system control device, and may include more or less components than those shown in the figure.

The hard disk expansion system control method provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following methods:

Obtain the control command sent by the server through the virtual interface, where the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers;

Data exchange with the hard disk according to the control command.

This embodiment provides a hard disk expansion system control device, which is applied to the above-mentioned hard disk expansion system. The system includes: a control unit, a communication unit, and a hard disk interface; the control unit is connected to the server through the communication unit, so as to obtain the control instructions; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers, and any storage device in the system establishes communication with each server through the virtual interface, so that each server can Read the data in the storage device; the control unit is connected with the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control instruction. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. A computer program is stored on a computer-readable storage medium, and when the computer program is executed by a processor, the steps described in the foregoing method embodiments are implemented. This embodiment provides a hard disk expansion system control medium, which is applied to the above-mentioned hard disk expansion system. The system includes: a control unit, a communication unit, and a hard disk interface; the control unit is connected to the server through the communication unit, so as to obtain the control instructions; wherein, the virtual interface is an interface created based on the physical port of the hard disk, and the number of virtual interfaces is consistent with the number of servers, and any storage device in the system establishes communication with each server through the virtual interface, so that each server can Read the data in the storage device; the control unit is connected with the hard disk port through the hard disk interface, so as to exchange data with the hard disk according to the control instruction. It can be seen that the technical solution provided by this application creates a virtual interface based on the physical port of the hard disk, and uses the control unit to exchange data with the hard disk according to the control command sent by the server through the virtual interface, so that each hard disk can communicate with multiple controllers. Connect to prevent the failure of a single controller from causing the data in the hard disk to be unreadable, improving the stability and reliability of the system.

It can be understood that if the methods in the above embodiments are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , executing all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc., which can store program codes. medium.

The hard disk expansion system and its control method, device, and medium provided by the present application have been introduced in detail above. Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. A hard disk expansion system, comprising:

the device comprises a control unit, a communication unit and a hard disk interface;

the control unit is connected with the server through a communication unit to acquire a control instruction sent by the server through a virtual interface; the virtual interfaces are interfaces created based on hard disk physical ports, and the number of the virtual interfaces is consistent with that of the servers;

and the control unit is connected with a hard disk port through the hard disk interface so as to exchange data with a hard disk according to the control instruction.

2. The hard disk expansion system of claim 1, wherein the communication unit includes a MINI SAS cable and a MINI SAS interface controller;

each pair of MINI SAS interface controllers is respectively arranged on the server side and the control unit side, and PCIE bus connection is established based on the MINI SAS cables.

3. The hard disk expansion system of claim 1, wherein the control unit is a PM42100 chip.

4. The hard disk expansion system according to claim 3, wherein the MINI SAS interface controller of the control unit side is connected with the control unit through an uplink interface of the control unit.

5. A hard disk expansion system control method is applied to a hard disk expansion system comprising a control unit, a communication unit and a hard disk interface, wherein the control unit is connected with a server through the communication unit, the control unit is connected with a hard disk port through the hard disk interface, and the method comprises the following steps:

acquiring a control instruction sent by a server through a virtual interface, wherein the virtual interface is an interface created based on a hard disk physical port, and the number of the virtual interfaces is consistent with that of the servers;

and exchanging data with the hard disk according to the control instruction.

6. The hard disk expansion system control method according to claim 5, wherein before the step of obtaining the control instruction sent by the server through the virtual interface, the method further comprises:

creating a shared name space based on the storage space of the hard disk;

a connection relationship is created between the shared namespace and the virtual interface.

7. The hard disk expansion system control method according to claim 6, further comprising, after the step of creating a connection relationship between the shared namespace and the virtual interface:

and binding each virtual interface of each hard disk to a downlink interface corresponding to each uplink interface of the control unit.

8. The utility model provides a hard disk expansion system controlling means which characterized in that is applied to the hard disk expansion system who includes the control unit, communication unit and hard disk interface, the control unit passes through communication unit and is connected with the server, the control unit passes through hard disk interface and hard disk port are connected, and the device includes:

the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring a control instruction sent by a server through a virtual interface, the virtual interface is an interface created based on a hard disk physical port, and the number of the virtual interfaces is consistent with that of the servers;

and the data exchange module is used for exchanging data with the hard disk according to the control instruction.

9. A hard disk expansion system control device is characterized by comprising a memory, a storage unit and a control unit, wherein the memory is used for storing a computer program;

a processor for implementing the steps of the hard disk expansion system control method according to any one of claims 5 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, carries out the steps of the hard disk expansion system control method according to any one of claims 5 to 7.

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