Subject: bug#37164: Generated installation image does not include grub.

From: Ludovic Courtès <[email-masked]>
Date: Wed, 28 Aug 2019 11:42:09 +0200

Hello Jesse,

Jesse Gibbons <[email-masked]> skribis:

> 1. generate the install image
>  guix system disk-image --file-system-type=iso9600 --verbosity=3 --
> root=installation-os-x86_64.iso  --system=x86_64-linux -e '(@ (gnu
> system install) installation-os)'
>
> 2. examine the resulting iso
> readlink installation-os-x86_64.iso | xargs file
>
> output: /gnu/store/3xp541s4zrxass6h6rcwfz7bc33wv84p-disk-image: DOS/MBR
> boot sector; partition 1 : ID=0x83, active, start-CHS (0x0,32,33), end-
> CHS (0xe3,198,58), startsector 2048, 3657239 sectors; partition 2 :
> ID=0xef, start-CHS (0xe3,198,59), end-CHS (0xe8,224,16), startsector
> 3659287, 81921 sectors
>
> 3. Compare this output with what file says about the official
> installation iso:
> wget https://ftp.gnu.org/gnu/guix/guix-system-install-1.0.1.x86_64-linu
> x.iso.xz
> unxz guix-system-install-1.0.1.x86_64-linux.iso.xz
> readlink guix-system-install-1.0.1.x86_64-linux.iso
>
> output:guix-system-install-1.0.1.x86_64-linux.iso: DOS/MBR boot sector;
> GRand Unified Bootloader, stage1 version 0x79, boot drive 0xbb, stage2
> address 0x8e70, 1st sector stage2 0xb8db31c3, stage2 segment 0x201;
> partition 1 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x3f6,38,4),
> startsector 1, 2694403 sectors, extended partition table (last)
>
> It appears file discovered the GRand Unified Bootloader in the official
> iso but not in the generated iso.

I can’t seem to reproduce it now:

--8<---------------cut here---------------start------------->8---
$ guix describe 
Generacio 101   Aug 26 2019 09:31:24    (nuna)
  guix a707484
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: a707484d64e7e46f8cb8401c660fbb6eb77ab9c6
$ guix system disk-image --file-system-type=iso9660 gnu/system/install.scm 
/gnu/store/cpyyjnwbpm2hrpcjf1j8y4yjis9za33s-image.iso
$ file /gnu/store/cpyyjnwbpm2hrpcjf1j8y4yjis9za33s-image.iso
/gnu/store/cpyyjnwbpm2hrpcjf1j8y4yjis9za33s-image.iso: DOS/MBR boot sector; GRand Unified Bootloader, stage1 version 0x79, boot drive 0xbb, stage2 address 0x8e70, 1st sector stage2 0xb8db31c3, stage2 segment 0x201; partition 2 : ID=0xef, start-CHS (0x3ff,63,32), end-CHS (0x3ff,63,32), startsector 2711068, 5760 sectors
$ guix system disk-image --file-system-type=iso9660 -e '(@ (gnu system install) installation-os)'
/gnu/store/cpyyjnwbpm2hrpcjf1j8y4yjis9za33s-image.iso
--8<---------------cut here---------------end--------------->8---

Not sure what’s going on…

Ludo’.