Purchased x100e today and spent several hours trying to get it boot from the USB stick. Unfortunately, no luck — getting “Operating System not found” message. Have tested the stick with another computer — boots perfectly.
BIOS boot sequence has USB HDD as the first entry followed by USB FDD and USB CD-ROM.
For some reason the USB HDD entry is pre-pended with a dash: -USB HDD.
Also, changing the Controller Mode Option value as suggested here did not make any difference.
Any suggestions? Thanx a lot.