Re: Boot .iso with GRUB2
There was a thread on Linux Questions years ago about this exact
topic. I managed to get Grub to boot multiple Debian Live iso images
but ended up testing various applications from Pendrive Linux simply
because everything was automated. I haven't tried with the new iso
made with Live Wrapper so there may be a few differences.
On 06/04/2018, Thomas Schmitt <scdbackup@gmx.net> wrote:
> Hi,
>
> Narcis Garcia wrote:
>> I've tried this with no luck:
>> iso_path="/debian-live-9.4.0-amd64-gnome.iso"
>> linux /live/vmlinuz-4.9.0-6-amd64 boot=live components
>> "${loopback}"
>> initrd /live/initrd.img-4.9.0-6-amd64
>>
>> Results in:
>> [...] ... mounted filesystem...
>
> So GRUB obviously found the ISO and started the kernel with that initrd.
>
>
>> (initramfs) Unable to find a medium containing a live file system
>
> A possible emitter of this message is in the initrd inside the ISO.
>
> gunzip < /mnt/iso/live/initrd.img-4.9.0-6-amd64 | strings | less
>
> produces the string
> Unable to find a medium containing a live file system
> and leads me via "livefs_root", "find_livefs", "check_dev" to
> fromiso=
>
> Dunno whether
> https://manpages.debian.org/testing/live-boot-doc/live-boot.7.en.html
> is applicable to debian-live-9.4.0-amd64-gnome.iso, but it has
>
> findiso=/PATH/TO/IMAGE
> Look for the specified ISO file on all disks where it usually looks
> for the .squashfs file (so you don't have to know the device name
> as in fromiso=....).
>
> fromiso=/PATH/TO/IMAGE
> Use a filesystem from within an ISO image that's available on
> live-media.
>
> If this does not yield insight, then one will have to unpack the compressed
> cpio archive initrd.img-4.9.0-6-amd64, to identify the script that bears
> the
> code about "Unable to find a medium containing a live file system", and
> to find out how to make it accept a ISO image file instead of e.g. a CD-ROM
> device.
>
>
> Have a nice day :)
>
> Thomas
>
>
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