Hi Alexander, I've checked several other linux ISO images (ubuntu,grml, Centos, Debian, archlinux) and only archlinux does not use type 0 for the first partition on their ISOs. But archlinux set a flag called hidden. Fedora use type 0 but with parted I canot set the partition, cfdisk shows the partition.
So, there's some magic in all this. In fai-cd we call xorriso with -iso_mbr_part_type 00. I do not like to change this without knowing it will not cause other problems. Can you find some information that convice me that a different type is correct? -- regards Thomas