Am 04.03.2026 um 20:52 schrieb Ralph Ronnquist via Dng:
> Yes, the ISOs have 3 boot equipments, to cater for booting from CD/DVD
> or disk with legacy bios boot, and CD/DVD or disk with UEFI bios boot
> (though I'm not sure UEFI bios has a CD/DVD boot option).
>
> And, the messages you get come from the preamble, which means that the
> kernel is loaded and started with the unpacked preamble. That boot
> stage sets up device drivers for the drivers, and when things work, it
> will mount the media so as to load and run the installer initrd.
>
> The preamble system is already an initrd unpacking with a filesystem,
> but (for technical reasons) restricted to fit (compressed) within a 32
> MiB FAT filesystem. At a guess, the required module(s) for your DVD
> device are included but the module loading scheme (which is a small
> udev setup) fails to load them for some reason. You might be able to
> figure that out and "resucue it" with the preamble shell.
>
> You could also try a "live" installer, although itt will want to find
> the media as well with a similar bootup procedure but its boot
> equipment is slightly different.
>
> Ralph.
>
> On Wed, Mar 04, 2026 at 01:42:28PM +0100, Marko Randjelovic via Dng wrote:
>> On 2026-03-03 12:13, Stevan Tiefert wrote:
>>> Am 03.03.2026 um 12:18 schrieb Antony Stone:
>>>> On Tuesday 03 March 2026 at 12:09:45, Stevan Tiefert wrote:
>>>>
>>>>> Am 02.03.2026 um 22:53 schrieb Ralph Ronnquist via Dng:
>>>>>> On Mon, Mar 02, 2026 at 11:12:46AM 0000, Stevan Tiefert wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> If I download any of the 6.1.0 ISOs (doesn't matter if dvd,
>> netinstall
>>>>>>> or server) and burned on a DVD and try to install devuan I got on
>>>>>>> machines with and without UEFI, errors like
>>>>>>>
>>>>>>> LABEL=DEVUAN610: Can't lookup blockdev
>>>>>>> LABEL=Ventoy: Can't lookup blockdev
>>>>>>> failed to mount the cdrom
>>>>>>> Starting emergency shell
>>>>>> When you write "burned on a DVD" I'm guessing you mean something else
>>>>>> than simply copying the ISO onto the initial blocks of the DVD, and
>>>>>> that that resulted in something else than a true copy of the ISO
>>>>>> bytes.
>>>>> Hello Ralph,
>>>>>
>>>>> I've done this on a commandline:
>>>>>
>>>>> cdrskin -v dev=/dev/sr0 devuan_excalibur_6.1.0_amd64_netinstall.iso
>>>>>
>>>>> Did I miss an option?
>>>> I'm not familiar with cdrskin, but after you have done the above, what
>> does
>>>> "blkid /dev/sr0" tell you?
>>>>
>>>>
>>>> Antony.
>>>>
>>> Hello Antony,
>>>
>>> output as follows:
>>>
>>> /dev/sr0: BLOCK_SIZE="2048" UUID="2025-12-25-18-19-01-00"
>>> LABEL="DEVUAN610" TYPE="iso9660" PTUUID="33cf3ee5" PPTYPE="dos"
>> Are you sure the iso images are made to be burned on a DVD, as netinstall
>> and
>> server can fit on a CD and desktop is too big for a DVD?
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Hello Ralph,

I will try a deep dive as you mentioned on the weekend ;-)