Le 03/09/2017 à 13:32, Luis Speciale a écrit :
ls gives me(hd0) (hd0,gpt6)(hd0,gpt5)(hd0,gpt4)(hd0,gpt3)(hd0,gpt2)(hd0,gpt1) (hd1) (cd0)
Obviously hd0 is the internal disk. So hd1 must be the USB drive. However ls should show partitions on it. I wonder if the image was properly copied. Can you check the partition table on the USB drive ?
set gives me cmdpath=(hd0,gpt1)/EFI/BOOT prefix=(hd0,gpt2)/boot/grub root=hd0,gpt2
hd0 in these variables means that the firmware booted on the internal disk, not the USB drive.
In EFI mode, hd0 is not always the boot drive, unlike BIOS mode.