From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Thomas Schmitt" Subject: Re: ISO installer image: GPT versus MBR partitions Date: Sat, 20 Apr 2019 12:50:49 +0200 Message-ID: <28973673174197768455@scdbackup.webframe.org> References: <20190420102617.6xlbznk3dj5gljkk@pelzflorian.localdomain> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([209.51.188.92]:42208) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hHnYA-0004sU-3D for guix-devel@gnu.org; Sat, 20 Apr 2019 06:48:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hHnY9-0000hS-1D for guix-devel@gnu.org; Sat, 20 Apr 2019 06:48:50 -0400 In-Reply-To: <20190420102617.6xlbznk3dj5gljkk@pelzflorian.localdomain> List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: bug-xorriso@gnu.org Cc: guix-devel@gnu.org Hi, Florian Pelz wrote: > I wonder, what kind of FAT is the EFI partition using? Could it be > the wrong kind of FAT? I got a mail from a bystander, Ady Ady whom i know from SYSLINUX/ISOLINUX mailing list. He proposes the experiment to exchange the whole EFI partiti= on of the Guix ISO by the one of Debian Live 9. This will not be able to really boot Guix, of course. But if the Mac's boot manager shows it and is willing to start the bootx64.efi program, then the FAT filesystem's meta data become prime suspect. The EFI partition of Debian Live 9 is smaller than the one of Guix 0.16.0. So after these steps : > I wrote guixsd-install-0.16.0.x86_64-linux.iso to my USB drive again. > Boot gets stuck again. > > I did `sudo dd if=3D/dev/zero of=3D/dev/sdc2` to zero out the EFI > partition. mount the Debian Live 9 ISO (e.g. at /mnt/iso) and do dd if=3D/mnt/iso/boot/grub/efi.img of=3D/dev/sdc2 Have a nice day :) Thomas