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Why is MPIO Setting in Windows with iSCSI, path verify enabled (PVE) set to 0

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Applies to

  • NetApp ONTAP 9
  • Microsoft Windows® Server 2016

Answer

  • This is a registry value set and is just one option you can set at the host OS layer effectively probing the target on all paths every 30 seconds.  0 disables this feature and 1 enables it. 
  • Set  to 0 by Windows Unified Host Utilities 7.1 and  set to 1 in version 7.2 ( Please check latest documentation for any change in this . )
    1. HKLM\SYSTEM\CurrentControlSet\Services\mpio\Parameters\PathVerifyEnabled

Please consult these technical support resources before making any changes to these parameters as any unsupported configuration by all vendors can cause loss of data access.

  1. The host operating system.
  2. Host bus adapter ( HBA ) vendor and MPIO driver documentation for your initiator.
  3. Storage platform best practice documentation.

Additional Information

Resources to check MPIO
  1. Multipath verification for Windows hosts.
  2. Interoperability Matrix Tool.
  3. Windows Unified Host Utilities 7.1.

 

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