

I had the same problem with another USB drive but thought it might just be bad luck for compatibility, however two USB drives doing the same thing seems a little bit suspect. To confirm the USB stick is working I pulled it out of the Microserver Gen8 and booted it on a laptop, which booted no problem. Internal drives boot priority - USB DriveKey first.Main Boot order - USB DriveKey is set to first priority.I checked my BIOS and all the USB related options appear to be correct:

Upon rebooting it doesn't boot from it at all. The ESXi setup detected the USB drive no problem and installed without an issues. I pulled all SATA drives before installing. The steps I took to do this was burn the ISO to a CD and installed it to a 8 GB Transcend while it was plugged into the internal USB slot of the Microserver Gen8. I installed ESXi 6 with the customised ProLiant HP image (Jan 2016). No matter what I try it will not make any attempt to boot the internal USB to load the hypervisor. I'm trying to run ESXi 6 off the Internal USB 2.0 port on a HP Microserver Gen8.
