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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for August 16th, 2010

x64 support in ESXi4.1 requires VT, I know that! but why warn so late?

Posted by jpluimers on 2010/08/16

I know that ESXi 4.1 requires VT (the Intel support for hardware assisted virtualization) to be enabled to run x64 VMs.
This is the warning that you get when starting an x64 VM, and you don’t have VT enabled:

[Window Title]
Virtual Machine Message
[Main Instruction]
Virtual Machine Message
msg.cpuid.noLongmodeQuestionFmt: This virtual machine is configured for 64-bit guest
operating systems. However, 64-bit operation is not possible.
This host is VT-capable, but VT is disabled.
VT might be disabled if it has been disabled in the BIOS settings or the host has not been
power-cycled since changing this setting.
(1) Verify that the BIOS settings enable VT and disable ‘trusted execution.’
(2) Power-cycle the host if either of these BIOS settings have been changed.
(3) Power-cycle the host if you have not done so since installing VMware ESX.
(4) Update the hosts’s BIOS to the latest version.
For more detailed information, see
Continue without 64-bit support?
[Yes] [No] [OK]

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Posted in BIOS, Boot, ESXi4, Hardware, HP XW6600, Power User, Virtualization, VMware, VMware ESXi | 3 Comments »

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