Does Knoppix 8 DVD boot in native EFI mode ? (qemu+OVMF aborts early)
first of all, thank you for chosing xorriso for packing up the Knoppix 8
ISO 9660 filesystem, which i got on the DELUG DVD which came with Linux
Magazin 04/17. I am xorriso's developer.
Nevertheless i wonder:
What is the success/failure ratio with booting Knoppix 8 from DVD
(not USB stick or alike) while EFI is in its native mode (not emulating
legacy BIOS) ?
Why i ask:
After a reader's letter in issue 05/17, that it does not start on a
"Samsung laptop", i had a look into the EFI System Partition of the DVD.
SYSLINUX for EFI from DVD ? Up to now only Didier Spaier demonstrated
working examples on syslinux mailing list. The partitions were huge.
All major distros use GRUB2 for EFI therefore.
So i tried (on Debian 8 as host system) what happens if i let qemu with
OVMF as EFI boot from emulated optical drive:
The same run with -hdc rather than -cdrom boots fine.
(So isohybridisation for EFI is ok.)
Only the attempt to extend partition 3 to the end of the storage device
yielded not more than 64 blocks enlargement (the Backup GPT's range)
which then caused a warning
"Overlay /KNOPPIX-DATA: Partition ist zu klein (<400MB)"
One can work around by appending the necessary amount of zeros before
$ dd if=/dev/zero bs=1M count=400 >>knoppix_v8_linuxmag_04_17.iso
The only EFI machine in my reach may not be used for experiments.
Further i cannot instigate others in the world to try with real hardware
and real DVD, because i don't know any download link for a Knoppix 8 ISO.