Boot from usb

[ghost]

I was unable to boot from usb until I modify some bios settings
#1. change bios setting AHCI -> compatible
#2. disable hyper threading in bios setting

Now it boots from usb.
although it says HDD: N/A

[IanSeyler]

That is correct (though the BIOS settings should not have made an effect). The BareMetal kernel does not have a USB host driver. Booting can occur but it will not be able to see the boot medium after switching to 64-bit mode.

At the moment the fully supported boot medium is a SATA hard drive in AHCI mode.