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The iSCSI initiator may show a incorrect MPIO path state

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Microsoft Knowledge Base Article

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Article ID: 2387367 - Last Review: August 31, 2010 - Revision: 1.0

The iSCSI initiator may show a incorrect MPIO path state

SYMPTOMS

The iSCSI initiator may show the incorrect MPIO path state when you use storage arrays which support ALUA (asymmetric logical unit access).

CAUSE

iSCSI initiator is not using MPIO_DSM_Path_V2 WMI Class to show the state, therefore, MPIO setting UI on iSCSI initiator cannot show and set the path state for ALUA.
In Addition, if you set the MPIO load balancing policy from iSCSI initiator, the state becomes unexpected state.  See this MSDN link for more information: MPIO_DSM_Path_V2 WMI Class (http://msdn.microsoft.com/en-us/library/ff562388(VS.85).aspx)

RESOLUTION

Use Device Manager to view and set the MPIO load balancing policy for storage arrays which support ALUA.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use (http://go.microsoft.com/fwlink/?LinkId=151500) for other considerations.

APPLIES TO
  • Microsoft Windows Server 2003 R2 Datacenter Edition (32-Bit x86)
  • Microsoft Windows Server 2003 R2 Datacenter x64 Edition
  • Microsoft Windows Server 2003 R2 Enterprise Edition (32-Bit x86)
  • Microsoft Windows Server 2003 R2 Enterprise x64 Edition
  • Microsoft Windows Server 2003 R2 Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003 R2 Standard x64 Edition
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 R2 Datacenter without Hyper-V
  • Windows Server 2008 R2 Enterprise without Hyper-V
  • Windows Server 2008 R2 Standard without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
Keywords: 
KB2387367
       

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