Hi, Luis Speciale a écrit : > > > (hd0) (hd0,gpt6)(hd0,gpt5)(hd0,gpt4)(hd0,gpt3)(hd0,gpt2)(hd0,gpt1) (hd1)
Pascal Hambourg wrote: > > Obviously hd0 is the internal disk. So hd1 must be the USB drive. Indeed, hd0 has too many partitions to be the unchanged ISO. The ISO has 2 and no "protective" MBR partition of type 0xee, which would indicate GPT. But hd1 has too few partitions. I'd expect GRUB2 to ignore the GPT of the ISO and maybe the MBR partition 1 of type 0x00. But MBR partition 2 with type 0xef should show up. I replay by booting a grub-mkrescue CD-ROM with Debian ISO as payload disk qemu-system-x86_64 -enable-kvm -m 512 \ -boot order=d -cdrom grub-mkrescue-original.iso \ -hda debian-9.1.0-amd64-netinst.iso It shows on (hd0) : (hd0,apple2), (hd0,apple1), (hd0,msdos2) I guess apple1 is the APM Block0 aka Driver Descriptor Map. Then apple2 would be the EFI system partition marked by APM partition1, the same as is marked by msdos2. > > I wonder if the image was properly copied. Can > > you check the partition table on the USB drive ? Maybe it's simply not that USB stick. (I had to lookup man qemu to find out how to force booting from -cdrom when -hda is bootable, too.) > I don't see how I can do this. How many hard-disk-like storage devices does the computer have ? Would the bootable USB stick be the second or the third "disk" ? Is it plugged in when GRUB starts ? Have a nice day :) Thomas