Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

[pelzflorian (Florian Pelz)]

On Sat, May 11, 2019 at 02:05:25PM +0200, Thomas Schmitt wrote:
> > I will continue testing the Windows 10 USB install medium:
> > /dev/sdb1  *     2048 15728639 15726592  7.5G  c W95 FAT32 (LBA)
> 
> That's not an EFI System Partition.
> So i assume the USB stick boots by BIOS and x86 machine code in the MBR.
> Unless we believe in EFI firmware that hops on arbitrary partitions ...
> 
> 

This is strange indeed.  The Macbook displays “EFI Boot” in the boot
selection menu.  efi/boot/bootia32.efi and efi/boot/bootx64.efi exist.
It could be a decoy though.  I do not know how to verify on Windows if
the boot used UEFI.  Shall I continue testing?

Regards,
Florian