Re: Does grub-mkrescue support UEFI hybrid USB/DVD images?

[Andrei Borzenkov <arvidjaar@gmail.com>]

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В Fri, 23 Jan 2015 19:29:07 +0100
Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@gmail.com> пишет:

> 
> > But returning (hd0,gpt2) would also be wrong here - ESP on CD image is
> > empty, we need to somehow jump from ESP to full ISO image.
> > 
> Returning hd0,gpt2 is fine. By convention ()/file refers to parent disk
> of whatever root partition is (as opposed to /file).

Not sure I follow. If you include part_gpt, grub will set prefix to
(hd0,gpt2)/boot/grub. But /boot/grub does NOT exist there - it exists
on (hd0), so correct prefix is (hd0)/boot/grub.

> So just including part_gpt in core should be enough. But perhaps we
> should put my patch as well to increase reliability. Consider scenario
> of installing on disk with gpt and apt and using apt partitions. GRUB
> will properly detect that it needs part_apple but part_gpt is not needed
> to access partition.
> Most of the install tools specify partition explicitly, so having
> partition is non-critical. Having disk on the hand is critical.
> 
> @Kris: Please try (after removing the other patch)
> diff --git a/util/grub-mkrescue.c b/util/grub-mkrescue.c
> index e719839..e02340f 100644
> --- a/util/grub-mkrescue.c
> +++ b/util/grub-mkrescue.c
> @@ -653,6 +653,9 @@ main (int argc, char *argv[])
>        char *efiimgfat;
>        grub_install_mkdir_p (efidir_efi_boot);
> 
> +      grub_install_push_module ("part_gpt");
> +      grub_install_push_module ("part_msdos");
> +
>        imgname = grub_util_path_concat (2, efidir_efi_boot, "bootia64.efi");
>        make_image_fwdisk_abs (GRUB_INSTALL_PLATFORM_IA64_EFI,
> "ia64-efi", imgname);
>        free (imgname);
> @@ -713,6 +716,8 @@ main (int argc, char *argv[])
>        free (efiimgfat);
>        free (efidir_efi);
>        free (efidir);
> +      grub_install_pop_module ();
> +      grub_install_pop_module ();
>      }
> 
>    grub_install_push_module ("part_apple");
> 
> 


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