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OceanStor Dorado 6.x and OceanStor 6.x Host Connectivity Guide for Windows


OceanStor Dorado 6.x and OceanStor 6.x Host Connectivity Guide for Windows

OS Native Multipathing Software

If the OS native multipathing software is used, set Host Access Mode to Asymmetric and retain the other default host and initiator settings. You can click the host name and check the settings on the Summary tab page.

If Host Access Mode is not Asymmetric, perform the following steps to change it:

  1. Click the host name and choose Operation > Modify.

2. Set Host Access Mode to Asymmetric and click OK.

3. Confirm the information and click OK.




Host Configuration

MPIO is disabled by default in Windows. You must manually enable it.

This section uses Windows Server 2016 as an example to describe how to install and configure MPIO. The MPIO installation and configuration procedures in other Windows Server releases are similar. For more details, see the Microsoft official documentation.

Add Multipath I/O.

Start Server Manager, choose Manage > Add Roles and Features, and select 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 to 2019, you can use multipathing command mpclaim to query disk information.

In the preceding figure, the VID is HUAWEI and the PID is XSG1. MPIO-ed is NO, indicating that the LUN is not taken over by MPIO.

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. Note that the VID must contain eight characters and the PID must contain 16 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 command is executed, the host restarts automatically. If the host does not restart automatically, restart it manually.

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 6-9.

If Host Access Mode is set to Asymmetric on the storage system, the default MPIO policy of the OS is Round Robin With Subset.

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.




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

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

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