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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).
Pre-Configuration Check

Pre-Configuration Check

Before configuring the online takeover function, check whether the application server, heterogeneous storage system, and local storage system work properly to ensure that the local storage system can smoothly take over services from the heterogenous storage system.

Check Items

Table 3-2 lists the pre-configuration check items.
Table 3-2  Pre-configuration check items

Category

Check Item

Operation

Application server

Service running status

Check the service running status on the application server.

The version of the multipathing software installed on the application server

Check the version of the multipathing software installed on the application server.

The number and status of the paths between the heterogeneous storage system and the application server

Check the number and status of the paths between the heterogeneous storage system and the application server.

IDs and WWNs of the LUNs mapped to the application server

Check IDs and WWNs of the LUNs mapped to the application server.

Heterogeneous storage system

Operating status and health condition of the heterogeneous storage system

Check the operating status and health condition of the heterogeneous storage system.

Local storage system

Operating status and health condition of the local storage system

Check the operating status and health condition of the local storage system.

NOTE:

The following operations use an application server with OceanStor UltraPath installed as an example. If a third-party multipathing software is installed on the application server, see the operation guide specific to the multipathing software used on site for command details.

  • Check the status of services running on application servers.

    Check whether services are running properly based on service types. When the service status is abnormal, restore the services first. For details about the operations, contact Huawei technical support.

  • Check the version of the multipathing software installed on the application server.
    NOTE:

    Go to the CLI management page of UltraPath before running any multipathing-related commands. For details, see the multipathing user guide of your operating system installed on the application server.

    UltraPath CLI #0 >show version
    Software Version : 8.03.XXX
    
    
    
    Driver   Version : 8.03.XXX
    
    
    The version information is indicated by SoftwareVersion in the command output:
    • If Software Version is 8.03.XXX, OceanStor UltraPath V100R008C20 is installed on the application servers.
    • If Software Version is earlier than 8.03.XXX, OceanStor UltraPath of a version earlier than V100R008C20 is installed on the application servers. If Software Version is later than 8.03.XXX, OceanStor UltraPath of a version later than V100R008C20 is installed on the application servers.

    If UltraPath is used and the version is earlier than V100R008C20, some functions of the storage systems taken over will be unavailable because the UltraPath version is too early. At the same time, masquerading properties will be configured on eDevLUNs during online takeover, and some new functions of the storage systems taken over will not be available. If you do not need to use the new functions, keep the status quo.

    If you will use the new functions, upgrade the UltraPath and modify the masquerading properties of eDevLUNs to No Masquerading. For details, see Other Types of Huawei Storage Systems.

    Both upgrading the UltraPath whose version is earlier than V100R008C20 and installation and deployment for an offline takeover require service suspension, and offline takeover eDevLUNs are no masquerading. Therefore, you are advised to upgrade UltraPath first and then perform installation and deployment for an offline takeover. For details about offline takeover, see Configuring Offline Takeover.

  • Check the number, information, and status of paths between the heterogeneous 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     2100001b32053e21  Huawei.Storage48      0A      200b4846fb8ca15f    Normal        --          FC        --    
        4     2100001b32055f20  Huawei.Storage48      0B      20194846fb8ca15f    Normal        --          FC        --    
        5     2100001b32055f21  Huawei.Storage48      0A      20084846fb8ca15f    Normal        --          FC        --    
    ----------------------------------------------------------------------------------------------------------------------------
    
    Note and record the following information:
    • Record the number of output records, which is the number of paths between the heterogeneous storage system and the application server.
    • Initiator Port and Target Port of each path are recorded.
    • If Path State is Normal, the status of the heterogeneous storage system and application server is normal.
      NOTE:

      If Path State is not Normal, ensure that the physical connection is normal between the heterogeneous storage system and application server before performing the following steps.

  • Check the IDs and WWNs of vLUNs mapped to the application server.
    UltraPath CLI #0 >show vlun  
    -----------------------------------------------------------------------------------------------------------------------------------------------
     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    
        1         sdc       hl_luntest_2  630d17e100b33e3909eae968000000f2     Normal  1.00GB        0A/0B       Huawei.Storage48       242   
    ------------------------------------------------------------------------------------------------------------------------------------------------
    UltraPath CLI #0 >show vlun id=0  
    =======================================================
                      VLUN#0 Information                   
    =======================================================
    Disk                  : sdb
    Name                  : hl_luntest
    Status                : Normal
    Capacity              : 1.00GB
    Driver                : Vendor-specific(DEFAULT)
    Product Name          : XXXXX          
    Vendor Name           : HUAWEI   
    Owning Controller     : 0A
    Working Controller    : 0B
    Num of Paths          : 2
    LUN WWN               : 630d17e100b33e3900135b9900000024
    Dev Lun ID            : --
    Array Name            : Huawei.Storage48
    Controller 0A
    Path 0          : Normal
    Manual IO Suspension  : Off
    -------------------------------------------------------

    Note and record Vlun ID and Lun WWN in the command output.

  • Check the heterogeneous storage system status.
    admin:/>show system general
     
      System Name         : XXX.Storage
      Health Status       : Normal
      Running Status      : Normal
      Total Capacity      : 2.000TB
      SN                  : 210235G6EHZ0CX0000XX
      Location            :
      Product Model       : XXXX
      Product Version     : VX00R00XCXX
      High Water Level(%) : 80
      Low Water Level(%)  : 30
      Time                : 2015-04-17/16:51:03 +08:00
    NOTE:

    Based on the model or version of the heterogeneous storage system to be taken over online, command outputs may be different. For details, see the operation manual of the heterogeneous storage system.

    • When Health Status and Running Status are displayed as Normal, the heterogeneous storage system is normal, you can perform subsequent operations.
    • When Health Status and Running Status are not displayed as Normal, rectify the fault of the heterogeneous storage system, and perform subsequent steps after ensuring that the heterogeneous storage system becomes normal.
  • Check the local storage system status.
    admin:/>show system general
       System Name         : XXX.Storage
      Health Status       : Normal
      Running Status      : Normal
      Total Capacity      : 3.186TB
      SN                  : 210235G6EHY0CX0000XX
      Location            :
      Product Model       : XXXX
      Product Version     : VX00R00XCXX
      High Water Level(%) : 80
      Low Water Level(%)  : 30
      Time                : 2015-04-17/17:00:03 +08:00
    • When Health Status and Running Status are displayed as Normal, the local storage system is normal, you can perform subsequent operations.
    • When Health Status and Running Status are not displayed as Normal, rectify the fault of the local storage system, and perform subsequent steps after ensuring that the local storage system becomes normal.

Follow-up Procedure

To ensure that the online takeover function can be used normally, continue subsequent steps after completing configurations for the application server and cluster nodes. For details about the restrictions on configurations for the application server and cluster nodes, see Application Servers and Management Nodes.

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Updated: 2018-12-29

Document ID: EDOC1000106155

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