Re: [Bug-xorriso] creating bootable .ISO with multiple methods

[Thomas Schmitt]

Hi,

> [grub-mkrescue] will not, however, make a single image that combines all 4
> combinations.  At least I can't figure it out.

Well, you need BIOS and EFI. The variants CD-ROM / hard disk
should be included in both software sets.

I never installed GRUB2 development. That's because i'm lazy
and because i did not install SYSLINUX either. All xorriso
development of boot features is done with bootable ISOs as
input. This way i get all needed input files and can compare
the result behavior with the behavior of the input ISO.

So i can help only by theories.
I see in grub-mkrescue (the script) :

if [ "${source_directory}" = "" ] ; then
    ...
    if test -e "${pc_dir}" ; then
        process_input_dir "${pc_dir}" i386-pc
    fi
    ...
    if test -e "${efi64_dir}" ; then
        process_input_dir "${efi64_dir}" x86_64-efi
    fi

One should try to get these two into effect simultaneously.

Alternatvively you could ask at the address@hidden mailing
list.


Strangely, in my collection of bootable ISO images there
is only one that was made with grub-mkrescue.
Its GRUB2 equipment is BIOS-only and can boot from CD-ROM
or hard disk. (Nevertheless the OS software in initrd is
not aware of hard disk and succeeds only with CD-ROM.)

Fedora, Debian, Archlinux, Ubuntu ... all combine software
from SYSLINUX for BIOS with GRUB/GRUB2 software for EFI.
The two bootloaders each bring their full equipment.

If you succeed in creating a BIOS + EFI bootable ISO with
GRUB2, then i would be interested in learning the procedure.
(Best by help of grub-mkrescue, of course.)


Have a nice day :)

Thomas