2012
03.16

A new Hyper-V KB article appeared online overnight for a situation where Windows Server 2008 and Windows Server 2008 R2 may hang on boot with the Hyper-V role enabled. 

“Consider the following scenario:

  • Install Windows Server 2008 or Windows Server 2008 R2.
  • Enable the Hyper-V Role under Server Roles.
  • The machine hangs or encounters a 0x3E bugcheck  (MULTIPROCESSOR_CONFIGURATION_NOT_SUPPORTED) after you restart the machine.

On a system with Mixed Processor Steppings, the Memory type range registers are not consistent across all the processors. When the Hyper-V role is enabled, this can cause system instability.

Ensure that all Processor Steppings are consistent (MTRR Capabilities) across all processors that are installed on the system. 

This has been reported to occur with the following combination of processors/Server hardware:
- HP BL460G1/G5 with Intel Xeon 5110 and E5310 processors installed”.

Personally, I thought people would know better than to mix processors in a single host like this.

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