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Verify storage access on the host

Before using the volume, you verify that the host can write data to the LUN and read it back.

Before you begin

You must have initialized the LUN and formatted it with a file system.

  1. Create and write to a file on the new LUN.
    > echo test file > <span id="GUID-6EF063A2-524C-4441-8E51-28AB131DBF94__V1797622" className="ph filepath">f:\test.txt</span>

  2. Read the file and verify data was written.
    > type <span id="GUID-6EF063A2-524C-4441-8E51-28AB131DBF94__V1797626" className="ph filepath">f:\test.txt</span>

  3. To verify that multipath is working, change the volume ownership.
    1. From the ThinkSystem System Manager GUI, go to Storage > Volumes, and then select More > Change ownership.
    2. On the Change Volume Ownership dialog box, use the Preferred Owner pull-down to select the other controller for one of the volumes in the list, and then confirm the operation.
    3. Verify that you can still access the files on the LUN.
      > dir <span className="ph filepath">f:\</span>

  4. Find the target ID.
    Note
    The dsmUtil utility is case sensitive.
    > <span id="GUID-6EF063A2-524C-4441-8E51-28AB131DBF94__V1797636" className="ph filepath">C:\Program Files (x86)\DSMDrivers\mppdsm\dsmUtil.exe</span> -a
  5. View the paths to the LUN and verify that you have the expected number of paths. In the <target ID> portion of the command, use the target ID that you found in the previous step.
    > <span id="GUID-6EF063A2-524C-4441-8E51-28AB131DBF94__V1797644" className="ph filepath">C:\Program Files (x86)\DSMDrivers\mppdsm\dsmUtil.exe</span> –g <span id="GUID-6EF063A2-524C-4441-8E51-28AB131DBF94__V1797648" className="keyword parmname"><target ID></span>