From mboxrd@z Thu Jan  1 00:00:00 1970
From: "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de>
Subject: Re: ISO installer image: GPT versus MBR partitions
Date: Wed, 24 Apr 2019 11:13:23 +0200
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To: Thomas Schmitt <scdbackup@gmx.net>
Cc: bug-xorriso@gnu.org, guix-devel@gnu.org

On Wed, Apr 24, 2019 at 08:56:57AM +0200, Thomas Schmitt wrote:
> Florian Pelz wrote
> > So=E2=80=A6 GPT is wrong for some optical media too?
>=20
> Not in this aspect. GPT partitions must not start at block 0.
> So the overall ISO superblock is not mountable as partition and thus
> free to claim the full image size as filesystem size.
>

Sorry, I meant to quote this aspect:

> > One can read trailing garbage not only from USB sticks but also from
> > most DVD types.
> > [=E2=80=A6]
> >
>=20
> So=E2=80=A6 GPT is wrong for some optical media too?
>=20


> > By the way, someone I know has a most peculiar machine called Lenovo
> > Ideapad 100S which does not boot Guix, [=E2=80=A6]
>=20
> If Guix does not show up in the boot manager, try a plain grub-mkrescue
> image that was made when GRUB was configured for both EFI variations:
> 32 bit x86 and 64 x86.
> My experiments are made when it is configured for those two plus PC-BIO=
S.
> The EFI partition then has bootx64.efi and bootia32.efi in /efi/boot/.
>=20

Will do.

Regards,
Florian