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Huawei SAN Storage Host Connectivity Guide for Windows

HUAWEI SAN Storage Host Connectivity Guide for Windows Servers
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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).
OS Native Multipathing Software

OS Native Multipathing Software

Storage System Configuration

If you use OS native multipathing software, you must select Uses third-party multipath software for the initiator, as shown in Figure 6-14.

Figure 6-14 Using OS native multipathing software

The Switchover Mode and Path Type depend on the actual services. For details, see HyperMetro Configuration Guide for Huawei SAN Storage Using OS Native Multipathing Software.

For details about the Windows versions, see the Huawei Storage Interoperability Navigator.

If a LUN has been mapped to the host, you must restart the host for the configuration to take effect after you modify the initiator parameters. If you configure the initiator for the first time, restart is not needed.

Host Configuration

As a built-in service in Windows, MPIO is disabled by default. You need to manually enable it. Moreover, ALUA must be configured on storage systems as required.

This section uses Windows Server 2012 R2 as an example to describe how to install and configure MPIO. The MPIO installation and configuration procedures for other Windows systems are the same and therefore will not be detailed. For more details, see the Microsoft official documentations.

  1. Add Multipath I/O.

    Start Server Manager, choose Manage > Add Roles and Features, and select Multipath I/O, as shown in Figure 6-15.

    Figure 6-15 Adding Multipath I/O

  2. Query the device's VID and PID.

    VID indicates the vendor ID, for example, HUAWEI.

    PID indicates the product ID, for example, S5500T, S5600T, or XSG1.

    If MPIO is installed on Windows Server 2008 or later versions, you can use multipathing command mpclaim to query disk information, as shown in Figure 6-16.

    Figure 6-16 Querying disk information

    In the preceding figure, the VID is HUAWEI and the PID is XSG1.

    NOTE:

    The PID and VID in this section are examples only.

  3. Configure MPIO to take over the storage system.

    You can add the target storage system on the MPIO console or run a command in Command Prompt to take over the storage. In this example, a command is run in Command Prompt.

    On the Windows server, open Command Prompt and run the mpclaim -r -i -d "HUAWEI XSG1 " command, as shown in Figure 6-17.

    Figure 6-17 Taking over Huawei storage

    NOTE:

    The VID must contain eight characters and the PID must contain 12 characters. If the characters are insufficient, add spaces. You can copy the VID and PID from the output of the mpclaim -e command.

    After the mpclaim -r -i -d "HUAWEI XSG1 " command is executed, the host restarts automatically.

  4. View MPIO policies.

    Rescan for disks after restarting the host. Ensure that the number of discovered disks is consistent with that of LUNs mapped to the host. Right-click a disk and choose Properties from the shortcut menu. You can view the policies on the MPIO tab page, as shown in Figure 6-18.

    Figure 6-18 MPIO policy management page

    Normally, the default MPIO policy is preferred.

    The default policy varies with operating system configurations. Table 6-10 lists the default policies for commonly used operating systems.

    Table 6-10 Default MPIO policy

    Operating System

    Storage System

    Default MPIO Policy

    Remarks

    Windows Server 2008

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Failover only

    -

    Windows Server 2008 R2

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Round Robin

    -

    Windows Server 2012

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Round Robin

    -

    Windows Server 2012 R2

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Round Robin

    -

    Windows Server 2016

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Round Robin

    -

    Windows Server 2019

    ALUA enabled

    Round Robin with Subset

    -

    ALUA disabled

    Round Robin

    -

    For Windows in non-HyperMetro networking, it is advisable to use the default MPIO policy.

  5. Enable path verification.

    On the MPIO tab, click Details. In the dialog box that is displayed, select Path Verify Enabled and click OK. Then restart the host for the configuration to take effect.

    Figure 6-19 Enabling path verification

    If a path switchover takes a long period of time, you can modify the timeout time for a driver by following instructions in How Do I Modify the Timeout Time for the FC HBA Port Driver?, How Do I Modify the iSCSI Initiator's Driver Timeout Time?, and How Do I Change the Number of TCP Data Retransmission Times? to shorten I/O interruption.

Verification

Run the mpclaim -s -d command to verify that the configuration has taken effect.

Figure 6-20 Verifying the MPIO disk information

Run the mpclaim -s -d MPIO Disk No. command to verify path information about an MPIO disk.

Figure 6-21 Verifying path information about an MPIO disk

Both AO (whose TPG_State is Active/Optimized) and AN (whose TPG_State is Active/Unoptimized) paths are displayed, indicating that ALUA configuration has taken effect.

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Updated: 2019-08-22

Document ID: EDOC1000150159

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