CN104102515A - Method and server for processing logical unit number of plug-in storage equipment - Google Patents

Abstract

A method, server and system for processing the logical unit number of an external storage device provided by the present invention, the method includes: searching for the host computer corresponding to the globally unique name number of the optical fiber port of the host bus adapter card connected to the external storage device, and searching The small computer system interface corresponding to the host; scanning the storage device under the small computer system interface to identify the logical unit number of the external storage device. The present invention can be implemented under the K-UNIX system, and in the process of server testing and implementation, the LUN of the external storage device can be identified under the system without restarting the server host after connecting the external storage device, so as to ensure the normal operation of the system and business.

Description

Method and server for processing logical unit numbers of external storage devices

technical field

The invention relates to the technical field of server key application hosts and storage, in particular to a method, server and system for processing logical unit numbers of external storage devices applied to the K-UNIX operating system.

Background technique

At present, some server hosts (such as Inspur Tiansuo K1 server) need to add a new storage mapping LUN (Logical Unit Number, logical unit number) when installing applications, but the system cannot immediately identify the LUN and install the application. The general method requires The system can recognize it only after restarting the server host. However, when the server host is mainly used in the basic core information platform of lifeline industries such as finance, telecommunications, energy, and transportation, the operating system cannot be restarted during the operation process because it is related to the security of the national economic operation, social security, and national strategy. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a method, server and system for processing logical unit numbers of external storage devices, so as to be able to identify newly added storage devices under the condition that the host system of the server is turned on and the business is running normally. .

In order to solve the above technical problems, the present invention provides a method for processing the LUN of an external storage device, which is applied to the K-UNIX operating system, including:

Find the host corresponding to the globally unique name number of the host bus adapter card fiber port connected to the external storage device, and find the corresponding small computer system interface of the host;

Scanning the storage device under the interface of the small computer system to identify the logical unit number of the external storage device.

Further, the above method also has the following features: after identifying the logical unit number of the external storage device, it also includes:

Find and output the logical unit number of the external storage device.

Furthermore, the above method also has the following characteristics:

The storage device includes an optical fiber storage device.

In order to solve the problems referred to above, the present invention also provides a kind of server, is installed with K-UNIX operating system, wherein, comprises:

A search module is used to search for the host corresponding to the globally unique name number of the host bus adapter card fiber port connected to the external storage device, and to find the corresponding small computer system interface of the host;

The processing module is used to scan the storage device under the interface of the small computer system, and identify the logical unit number of the external storage device.

Further, the above server also has the following characteristics:

The processing module is further configured to search and output the logical unit number of the external storage device after identifying the logical unit number of the external storage device.

In order to solve the above problems, the present invention also provides a system for processing LUNs of external storage devices, including a host bus adapter card for connecting external storage devices and the above-mentioned server, wherein,

The server is used to search for the host corresponding to the global unique name number of the host bus adapter card fiber port connected to the external storage device, and to search for the corresponding small computer system interface of the mainframe; scan the small computer system interface under the described small computer system interface The storage device identifies the logical unit number of the external storage device.

Further, the above-mentioned system also has the following characteristics:

The server is further configured to search for and output the logical unit number of the external storage device after identifying the logical unit number of the external storage device.

Further, the above-mentioned system also has the following characteristics:

The storage device includes an optical fiber storage device.

In summary, the method, server and system for processing the logical unit number of an external storage device provided by the present invention can be implemented under the K-UNIX system. During the server test and implementation process, there is no need to restart the server host after connecting the external storage device The LUN of the external storage device can be identified under the system to ensure the normal operation of the system and business.

Description of drawings

FIG. 1 is a flowchart of a method for processing a logical unit number of an external storage device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a server according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

Fig. 1 is a flowchart of a method for processing a logical unit number of an external storage device according to an embodiment of the present invention. As shown in Fig. 1, the method of this embodiment includes the following steps:

Step 101, search for the hostx corresponding to the wwn number;

After connecting the external storage device to the server HBA card through the switch, artificially record the wwn (World Wide Name, globally unique name) number corresponding to the fiber port of the HBA (Host Bus Adapter, host bus adapter) card.

The storage devices in this embodiment include optical fiber storage devices, for example, Inspur AS600G3, EMCDMX3, etc.

In the present embodiment, the server receives the systool-c fc_host-v command, and promptly can check each port information of the optical fiber card under the system, wherein Class Device (classification equipment) is hostx, and port_name (port name) is the corresponding wwn number of hostx.

The server of this embodiment installs and runs the K-UNIX operating system.

Step 102, the server searches for the SCSI (SmallComputer System Interface, small computer system interface) corresponding to the hostx corresponding to the wwn number, and can find information such as channxl (frequency), id (identification), and lun of all storage devices connected to the HBA card.

In this embodiment, the system can view it after receiving the cat/proc/scsi/scsi command. After the storage device is connected to the HBA card, the information of the newly connected storage device can be viewed in the file output by the command, where Host: scsix corresponds to hostx , you can confirm that the HBA card is connected to the storage device.

Step 103, the server re-scans the storage device under the SCSI interface to identify the LUN;

In this embodiment, after receiving the command echo "C T L ">/sys/class/scsi_host/hostx/scan, the server scans the SCSI interface corresponding to the host computer corresponding to the WWN of the fiber port of the HBA card connected to the external storage device. The storage device does not scan other SCSI interface devices, so that the LUN of the external storage device can be accurately scanned and identified without affecting the original storage device, which can ensure the absolute normal operation of the system and the absolute security of stored data.

Among them, C is the frequency (Channel) number of the HBA; T is the SCSI target (target) ID; L is the LUN.

Step 104, the server searches for and outputs the newly added LUN;

In this embodiment, the server can find the newly added LUN through the fdisk-l command.

fdisk is a command for disk management under the system. fdisk–l can list all disks under the system (including external storage devices). After the newly added disk is recognized, you can use this command to find the newly added disk.

The 2.6 kernel (K-UNIX kernel is 2.6.28) has a dynamic LUN scanning mechanism. The HBA driver exports the scan function to the /sys directory, which can be used to rescan the storage devices under the SCSI interface.

The system for processing the LUN of the external storage device in the embodiment of the present invention includes: a server (such as Inspur Tiansuo K1 server); an HBA card; an optical fiber switch; and a storage system. in:

Inspur Tiansuo K1 server is the first domestically produced minicomputer, installed with K-UNIX operating system, and used to identify newly added storage LUNs.

The HBA card is installed in the PCIE (the latest bus and interface standard) slot of the Inspur Tiansuo K1 server host IO (input and output) exchange module, and is used to connect external storage devices.

Optical switch, used to connect HBA cards and storage devices.

A storage system for installing applications.

Fig. 2 is the schematic diagram of the server of the embodiment of the present invention, as shown in Fig. 2, the server in the present embodiment is installed with K-UNIX operating system, can comprise:

The search module is used to find the host corresponding to the WWN of the HBA card fiber port connected to the external storage device, and find the corresponding SCSI of the host;

The processing module is used to scan the storage device under the SCSI and identify the LUN of the external storage device.

In a preferred embodiment, the processing module, after identifying the logical unit number of the external storage device, can also be used to search for and output the LUN of the external storage device.

The method proposed in the embodiment of the present invention can realize the newly added LUN of the external storage device without restarting the server under the Inspur Tiansuo K1K-UNIX system, which has the advantages of fast, safe and stable.

In the embodiment of the present invention, by using the LUN dynamic scanning mechanism under the K-UNIX kernel, the HBA card driver exports the scan function to the /sys directory, which can be used to re-scan the storage device under the SCSI interface, and perform identification under the system operate.

To ensure the safe operation of the system, when scanning storage devices under the SCSI interface, only the interface corresponding to the newly added storage LUN is scanned, and other SCSI interface devices are not scanned. In this way, the LUN of the external storage device can be accurately scanned and identified without The original storage device will be affected. If the scanning is wrong, the system may crash, which can ensure the absolute normal operation of the system and the absolute safety of stored data.

Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk, and the like. Optionally, all or part of the steps in the foregoing embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any specific combination of hardware and software.

The above are only preferred embodiments of the present invention. Of course, the present invention also has other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various Corresponding changes and modifications, but these corresponding changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. A method for processing a logical unit number of an external storage device, applied to the K-UNIX operating system, comprising: Find the host corresponding to the globally unique name number of the host bus adapter card fiber port connected to the external storage device, and find the corresponding small computer system interface of the host; Scanning the storage device under the interface of the small computer system to identify the logical unit number of the external storage device. 2. The method according to claim 1, characterized in that: after identifying the logical unit number of the external storage device, further comprising: Find and output the logical unit number of the external storage device. 3. The method according to claim 1 or 2, characterized in that: The storage device includes an optical fiber storage device. 4. a kind of server, is installed with K-UNIX operating system, is characterized in that, comprises: A search module is used to search for the host corresponding to the globally unique name number of the host bus adapter card fiber port connected to the external storage device, and to find the corresponding small computer system interface of the host; The processing module is used to scan the storage device under the interface of the small computer system, and identify the logical unit number of the external storage device. 5. The server according to claim 4, characterized in that: The processing module is further configured to search and output the logical unit number of the external storage device after identifying the logical unit number of the external storage device. 6. A system for processing LUNs of external storage devices, comprising, a host bus adapter card for connecting external storage devices and the server according to claim 4 or 5, characterized in that, The server is used to search for the host corresponding to the global unique name number of the host bus adapter card fiber port connected to the external storage device, and to search for the corresponding small computer system interface of the mainframe; scan the small computer system interface under the described small computer system interface The storage device identifies the logical unit number of the external storage device. 7. The system of claim 6, wherein: The server is further configured to search for and output the logical unit number of the external storage device after identifying the logical unit number of the external storage device. 8. The system according to claim 6 or 7, characterized in that: The storage device includes an optical fiber storage device.