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OceanStor 2200 V3 and 2600 V3 Storage System V300R005 SmartVirtualization Feature Guide 07

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Checking the Multipathing Status

Checking the Multipathing Status

Check information about paths between the heterogeneous storage system, local storage system, and application server, LUNs mapped to the application server, and the number of I/O paths of the LUNs to determine whether eDevLUNs are LUNs from the heterogeneous storage system.

Prerequisites

The IDs, WWNs, and path information that are queried in Table 3-2 have been recorded.

Context

OceanStor UltraPath V100R008C20 is used as an example here. If UltraPath of an earlier version or third-party multipathing software is installed on the application server, refer to the operation guide of the corresponding multipathing software for specific commands.

Procedure

  1. Log in to the application server and go to the CLI management page of the UltraPath.
  2. Run show path to query information about paths between the heterogeneous storage system, local storage system, and application server.

    UltraPath CLI #0 >show path
    ----------------------------------------------------------------------------------------------------------------------------
     Path ID   Initiator Port      Array Name     Controller    Target Port     Path State  Check State  Port Type  Port ID 
        0     2100001b32053e20  Huawei.Storage48      0B      20184846fb8ca15f    Normal        --          FC        --    
        1     2100001b32053e20  Huawei.Storage48      0A      200b4846fb8ca15f    Normal        --          FC        --    
        4     2100001b32055f20  Huawei.Storage48      0B      20194846fb8ca15f    Normal        --          FC        --    
        5     2100001b32055f20  Huawei.Storage48      0A      20084846fb8ca15f    Normal        --          FC        --    
    ----------------------------------------------------------------------------------------------------------------------------
    ----------------------------------------------------------------------------------------------------------------------------
     Path ID   Initiator Port      Array Name     Controller    Target Port     Path State  Check State  Port Type  Port ID 
        2     2100001b32054e20  Huawei.Storage46      0B      24103400a30d9c5f    Normal        --          FC        --    
        3     2100001b32054e21  Huawei.Storage46      0A      24003400a30d9c5f    Normal        --          FC        --    
        6     2100001b32056f20  Huawei.Storage46      0B      24113400a30d9c5f    Normal        --          FC        --    
        7     2100001b32056f21  Huawei.Storage46      0A      24013400a30d9c5f    Normal        --          FC        --    
    ----------------------------------------------------------------------------------------------------------------------------
    
    NOTE:

    Run Array Name to differentiate the local storage system from the heterogeneous storage system. For example, in the preceding command output, Huawei.Storage48 and Huawei.Storage46 indicate the heterogeneous storage system and local storage system, respectively.

    In the command output, check whether the following requirements are met:
    • Initiator Port and Target Port of each path between the heterogeneous storage system and application server are consistent with the information recorded in chapter Pre-Configuration Check.
    • Initiator Port and Target Port of each path between the local storage system and application server is different from those of each path between the heterogeneous storage system and application server.

    If yes, paths are normal. Perform 3.

    If no, paths are abnormal. Perform the following steps to check information about paths between the application server, heterogeneous storage system, and local storage system.
    1. Check the physical networking and confirm the number of devices that connect the application server to the heterogeneous storage system and local storage system, and information about the initiator port and target port.
    2. Run show path to check the number of paths between the application server, heterogeneous storage system, and local storage system, and information about Initiator Port and Target Port of each path.
    3. Locate the path that is different from other paths.
    4. Reinsert the physical connection of the abnormal path.
    5. Run show path, wait until path status becomes normal, and perform 3.

  3. Run the show vlun type=all command to query the information about the LUNs that are mapped to the application server.

    UltraPath CLI #0 >show vlun type=all
    -----------------------------------------------------------------------------------------------------------------------------------------------
     Vlun ID      Disk          Name                  Lun WWN                  Status Capacity Ctrl(Own/Work)      Array Name     Dev Lun ID
        0         sdb        hl_luntest   630d17e100b33e3900135b9900000024     Normal  1.00GB        0A/0B       Huawei.Storage48       36  
        0         sdb        hl_luntest   630d17e100b33e3900135b9900000024     Normal  1.00GB        0A/0B       Huawei.Storage46       37   
        1         sdc       hl_luntest_2  630d17e100b33e3909eae968000000f2     Normal  1.00GB        0A/0B       Huawei.Storage48       242
        1         sdc       hl_luntest_2  630d17e100b33e3909eae968000000f2     Normal  1.00GB        0A/0B       Huawei.Storage46       243   
    ------------------------------------------------------------------------------------------------------------------------------------------------
    In the command output, check whether Vlun ID is unique and whether Lun WWN is the same as that obtained in Table 3-2:
    • If yes, eDevLUNs have been masqueraded as the LUNs in the heterogeneous storage system. Go to 4.
    • If no, eDevLUNs are not masqueraded as the LUNs in the heterogeneous storage system. Configure the eDevLUNs again.

  4. Run the show vlun id=XXX type=all command to query the path information about a specific LUN.

    NOTE:

    XXX is the ID of the vLUN mapped to the application server after an external LUN on the heterogeneous storage system is queried in 3 to be masqueraded as an eDevLUN. For example, in 3, Vlun ID of the eDevLUN mapped to the application server is 0.

    UltraPath CLI #0 >show vlun id=0 type=all
    =======================================================
                      VLUN#0 Information                   
    =======================================================
    Disk                  : sdb
    Manual IO Suspension  : Off
    Aggregation Type      : Migration
    Aggregation Specific Attribution
        IO Direction      : Source
        Rollback          : Disable
    Aggregation Member#0 Infomation
        Name              : hl_edvlun1
        Status            : Normal
        Capacity          : 1.00GB
        Aggregation Specific Attribution : Target Device
        LUN WWN           : 630d17e100b33e3900135b9900000024
        Array Name        : Huawei.Storage46
        Array SN          : 210235980510XX0000XX
        Driver            : Vendor-specific(DEFAULT)
        Product Name      : XXXXX            
        Vendor Name       : HUAWEI  
        Owning Controller : 0A
        Working Controller: 0B
        Num of Paths      : 4
        Controller 0A
        Path 0            : Normal
        Path 7            : Normal
        Controller 0B
        Path 2            : Normal
        Path 6            : Normal
    Aggregation Member#1 Infomation
        Name              : hl_luntest
        Status            : Normal
        Capacity          : 1.00GB
        Aggregation Specific Attribution : Source Device
        LUN WWN           : 630d17e100b33e3900135b9900000024
        Array Name        : Huawei.Storage48
        Array SN          : SN98765432XX765432XX
        Driver            : Vendor-specific(DEFAULT)
        Product Name      : XXXXx            
        Vendor Name       : HUAWEI  
        Owning Controller : 0A
        Working Controller: 0B
        Num of Paths      : 4
        Controller 0A
        Path 1            : Normal
        Path 5            : Normal
        Controller 0B
        Path 0            : Normal
        Path 4            : Normal
    -------------------------------------------------------
    
    NOTE:
    After the external LUN is taken over online, Aggregation Type becomes Migration in the command output.
    • In the command output, information in Source Device of Aggregation Specific Attribution indicates the information about the vLUN mapped from the external LUN of the heterogeneous storage system to the application server.
    • In the command output, information in Target Device of Aggregation Specific Attribution indicates the information about the vLUN mapped from the eDevLUN masqueraded in the local storage system to the application server.
    In the command output of the external LUN and eDevLUN, check whether their LUN WWNs, Product Names, and Vendor Names are consistent, and their Array SNs are different.
    • If yes, the application server identifies the eDevLUN as a LUN on the heterogeneous storage system.
    • If no, the application server identifies the eDevLUN as a new LUN. Contact Huawei technical support.

Follow-up Procedure

If the LUN path information that is queried increases (that is, the application server identifies eDevLUNs as the LUNs in the heterogeneous storage system) and the OceanStor 2200 V3/2600 V3 storage system does not need to take over services from the heterogeneous storage system, perform a rollback. For details about the operations, see Performing Rollback.

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Updated: 2018-12-29

Document ID: EDOC1000106155

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