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The things that are better left unspoken

a blog by Sander Berkouwer

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KnowledgeBase: Active Directory database becomes corrupted when a Windows Server 2012-based Hyper-V host server crashes

As I’ve written before, Microsoft has made significant strides on making Active Directory Domain Controllers safe(r) to virtualize in Windows Server 2012. Sometimes, however, you encounter a situation that makes all that progress seem to disappear. Microsoft, last week, has released KnowledgeBase Article 2853952, describing such a situation.

  

The situation

In KnowledgeBase Article 2853952, Microsoft describes the situation where the Active Directory database may become corrupted, when you have a Windows Server 2012-based virtualized Active Directory Domain Controller on a Windows Server 2012-based Hyper-V host server and the Hyper-V host server crashes or encounters a power outage.

  

The cause

This issue occurs because the guest system requests the Hyper-V server to turn off disk caching on a disk. However, the Hyper-V host server misinterprets the request and keeps disk caching enabled.

    

The resolution

To resolve this issue, install update rollup 2855336 on the Windows Server 2012-based Hyper-V host server. This update is part of the 2855336 Update for Windows RT, Windows 8, and Windows Server 2012 update rollup: July 2013.

 

Related KnowledgeBase Articles

2853952 Active Directory database becomes corrupted when a Windows Server 2012-based Hyper-V host server crashes 
2855336 Windows RT, Windows 8, and Windows Server 2012 update rollup: July 2013

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