Hi,

 

Can't seem to get IOMMU to enable.

 

I have an Asus z87a motherboard. In bios I have enabled  Virtualization Technology Enabled (enabled by default https://www.asus.com/us/support/faq/1043786/

There is no specific/additional settings for VT-D or VT-X here, just the one Virtualization Technology.

 

I initially was running a 4570k which I found out does only support VT-X and not VT-D, which is why I bought a second hand Xeon e3-1226 v3 chip, which supports the VT-D also (according to https://ark.intel.com/content/www/us/en/ark/products/80917/intel-xeon-processor-e3-1226-v3-8m-cache-3-30-ghz.html)

Yet UNRAID still states Disabled for IOMMU.

What I did find in the BIOS, which made me think could be the potentially have something to do with it, is that under Advanced CPU configuration, it does not mention Intel VT-d to be (or not to be supported), bbut does so for HT Technology (not supported) and VT-X technology (supported).

Any thoughts?

Thanks
 

There is no setting at the Unraid level to support IOMMU - Unraid merely queries the BIOS to see if it is.    

 

If you are sure your hardware supports it then there must be a BIOS level setting required to get it made visible to Unraid.

Cool thanks for that. I will further investigate the motherboard then.

There are usually two different BIOS settings, one to enable virtualization in general (and that one is already enabled), and another for IOMMU, with Intel it's usually called VT-d

Yes, I have combed through all settings on the motherboard, but no additional settings apart from the Virtualization Technology. No VT-X or VT-D seperate settings.

It is looking more and more towards the motherboard only supporting VT-X. The documentation from the mobo only states:

 

Intel Virtualization Technology [Disabled]
When set to [Enabled], a V�� can utilize the additional hardware capabilities provided by
Vanderpool Technology.
Configuration options: [Disabled] [�nabled]

 

So no additional options for VT-D.

 

After another long search, I managed to find this link https://ark.intel.com/content/www/us/en/ark/products/75013/intel-z87-chipset.html which clearly states VT-D is not supported for the z87 chipset (my mobo is z87a asus). So safe to say I need a new mobo..

 

Good excuse for a mobo and cpu and ram upgrade then

Thx guys