From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Subject: bug#33639: ISO installer image is broken on i686
Date: Thu, 06 Dec 2018 08:19:12 +0100
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Ludovic Court=C3=A8s <ludo@gnu.org> skribis:

> The ISO installer image as produced on commit
> 4a0b87f0ec5b6c2dcf82b372dd20ca7ea6acdd9c by
>
>   guix system disk-image --file-system-type=3Diso9660 \
>     -s i686-linux gnu/system/install.scm
>
> contains unreadable file(s), at least /var/guix/db/db.sqlite.

I can reproduce the I/O error by mounting the image:

--8<---------------cut here---------------start------------->8---
ludo@ribbon ~/src/guix$ sudo losetup /dev/loop0 /gnu/store/1yanxg3cz5wi6vhp=
vhipxvmjwm201fbm-image.iso
ludo@ribbon ~/src/guix$ sudo mount -t iso9660 /dev/loop /mnt/disk/
mount: /mnt/disk: WARNING: device write-protected, mounted read-only.
ludo@ribbon ~/src/guix$ cat < /mnt/disk/var/guix/db/db.sqlite > /dev/null
cat: -: Eraro de en-eligo
ludo@ribbon ~/src/guix$ dmesg |tail
[   41.186408] shepherd[1]: Service guix-daemon has been started.
[   45.725418] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[   45.933911] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready
[   49.496112] e1000e: enp0s31f6 NIC Link is Up 1000 Mbps Full Duplex, Flow=
 Control: None
[   49.496165] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s31f6: link becomes ready
[  203.358136] ISO 9660 Extensions: RRIP_1991A
[  215.199352] attempt to access beyond end of device
[  215.199357] loop0: rw=3D524288, want=3D1903876, limit=3D1899264
[  215.199362] attempt to access beyond end of device
[  215.199363] loop0: rw=3D0, want=3D1903532, limit=3D1899264
--8<---------------cut here---------------end--------------->8---

So the problems lies with the VM that creates the image.

Ludo=E2=80=99.