Skip to main content
NetApp Knowledgebase

Windows 2008 based host loses access to storage, error "Microsoft DSM returned a bogus Path to MPIO device identifier"

Applies to

  • Windows Server 2008 SP2
  • Windows Server 2008 R2 
  • Microsoft Multipath I/O (MPIO) and Microsoft Device Specific Module (DSM)

Issue

  • Windows 2008 SP2 or R2-based Server connected to NetApp SAN using Microsoft Multipath I/O (MPIO) and Microsoft Device Specific Module (MS-DSM).
  • In this scenario, when multiple paths are lost concurrently, host loses access to the storage (LUN). 
  • a "System Event ID 33" error message, indicating "Microsoft DSM returned a bogus Path to <MPIO device identifier>", is encountered.

 

CUSTOMER EXCLUSIVE CONTENT

Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support