I'm using a USB 3.0 stick. All of my legacy USB BIOS settings are enabled. I have separate ones for 2.0 and 3.0. I'm still getting the mountroot issue. I've tried the initial wait fix too... I purchased this usb 3.0 stick specifically for this, so I don't really want to use a 2.0 stick. Any insight to this USB 3.0 thing yet?