KB2776366 – “0x0000000A” Stop Error On W2008 R2 Or WS2012 Hyper-V Host That Has Many Passthrough Disks

This KB article originally only mentioned Windows Server 2008 R2 Hyper-V.  It was updated in June 2013 to include Windows Server 2012 Hyper-V.

Two points:

  1. Consider kicking the person responsible for the use of passthrough disks that are smaller than 2040 GB (I’ll allow that 1 qualifier for W2008 R2) in the family jewels.  Once for every found passthrough disk.  With this apparent genetic disposition, they shouldn’t be allowed to breed anyway … in my opinion.
  2. There is a KB article on this scenario.

Consider the following scenario:

  • You have the Hyper-V role installed on a computer that is running Windows Server 2008 R2 or Windows Server 2012.
  • You have a virtual machine stored on the computer.
  • There are many pass-through disks assigned to the virtual machine.
  • Heavy I/O operations occur over the pass-through disks.

In this scenario, the system may crash. Additionally, you receive a stop error message that resembles the following:

Stop 0x0000000A (Parameter1, Parameter2, Parameter3, Parameter4)


  • This Stop error describes an IRQL_NOT_LESS_OR_EQUAL issue.
  • The parameters in this Stop error message vary, depending on the configuration of the computer.
  • Not all “0x0000000A” Stop errors are caused by this issue.

This issue occurs because a stale thread object is dereferenced in memory.

A supported hotfix is available from Microsoft.

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