![]() External 1TB 2.5" HDD (Seagate RSS LLC FreeAgent GoFlex USB 3.0).After setting xHCI Mode to "Enabled", all devices are correctly identified as USB 3.0.ĭuring my tests I've use two USB 3.0 capable devices on my 5th Gen Intel NUC (NUC5i5MYHE): According to the documentation, in "Smart Auto" mode the USB 3.0 port acts like a 2.0 port before OS USB 3.0 drivers are loaded. For whatever reason, this does not work properly with ESXi. Within the UEFI the xHCI mode is configurable with a default of "Smart Auto". ![]() The solution was quite simple and not related to an ESXi, but to a UEFI configuration. This problem applies to both, USB devices in path-through mode, and USB devices mounted from the command line with usbarbitrator disabled. Unfortunately all of my devices are detected as USB 2.1, despite the USB 3 hub was visible. I know that USB 3.0, also known as eXtensible Host Controller Interface (xHCI), is supported in ESXi 6.0 and ESXi 5.5 Build 2143827 or later. In my latest post USB Devices as VMFS Datastore in vSphere ESXi 6.0 I had a problem with USB 3.0 devices that are detected as USB 2 in ESXi.
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