From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?G=C3=A1bor?= Boskovits <boskovits@gmail.com>
Subject: bug#33639: ISO installer image is broken on i686
Date: Tue, 16 Apr 2019 11:57:45 +0200
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To: Thomas Schmitt <scdbackup@gmx.net>
Cc: Guix-devel <guix-devel@gnu.org>, 33639@debbugs.gnu.org

Hello people,

Thomas Schmitt <scdbackup@gmx.net> ezt =C3=ADrta (id=C5=91pont: 2019. =C3=
=A1pr. 15., H, 19:54):
>
> Hi,
>
> Florian Pelz wrote:
> > Well this is strange.  I got fine ISO images each time (fine with no
> > complaints from xorriso or fdisk and bootable in QEMU without errors),
> > but after dd=E2=80=99ing them to different USB flash drives each time I=
 get
> > kernel output when inserting the flash drive:
> > [   10.025223] GPT:Primary header thinks Alt. header is not at the end =
of
> > the disk.
>
> The alternative/backup header is a property of GPT which makes it
> rather unsuitable for disk images. xorriso puts it correctly into the
> last 512-byte block of the image. But when copied to a storage device,
> it should move up to the last block of the device.
> Even worse, the main GPT header at 512-byte LBA 1 needs to learn the
> new address.
>

Yes, this is a really painful point.

Could we create a simple tool to write the disk images to a disk
correcting this problem?

Does not look too hard?

I am also forwarding this to guix devel. I removed the xorriso bug
list, as I feel this does not belong there.

Best regards,
g_bor