ESXi 6.5 + USB 3.0 + xHCI

Hello,

I have a SYS-E200-8D Micro Server, and wanted to use an external USB 3.0 enclosure (with an SSD disk) as an additional Datastore.

I can mount the external enclosure without any problems within ESXi as an additional Datastore, but it is only attached through USB 2.0, therefore the read/write throughput is quite small.

I have already followed the steps as described here and enabled xHCI in the BIOS: http://www.virten.net/2015/10/usb-3-0-devices-detected-as-usb-2-in-esxi-6-0-and-5-5/

But when I want to load the xHCI driver through "vmkload_mod xhci" I get the following error message:

"vmkload_mod: Can not load module xhci: Invalid or missing namespace".

Do you have any ideas which problem I'm facing here, and why the driver couldn't be loaded?

Thanks for your help,

-Klaus