vSphere 4 - Failed to load iommu driver

Unanswered Question
Jun 18th, 2010
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When I boot ESX 4 with the latest up on our UCS B class blades I get a:

"Failed to load iommu driver" and when it finally finishes booting on the first screen I have message in red:

cpu1 :4106)Mod: 2077: Initialization for vtd failed with -1"

I already have Intel Virtualization Technology enabled on all of them.  This message wasn't showing last week but it started showing today.

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terran0925 Fri, 06/18/2010 - 12:39
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Strange, I rebooted the server 2 times and the error went away.

If anyone knows what might have caused this please let me know.  Thanks.


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