On Wed, May 10, 2023 at 04:58:06PM +0200, John Paul Adrian Glaubitz wrote: > Well, it works with ISO images, that's the point. The installation CDs use > iso9660 > as their filesystem and they have a blessed bootloader which shows in the > firmware's > boot menu. > > Thomas Schmitt briefly explained how xorriso does it, but I don't really > understand > the underlying concept yet but I would assume you could use it for booting > using a > FAT16 partition as well.
It makes the CD contain both HFS+ and ISO9660 filesystem (sharing the same data blocks) and of course by having HFS+ it means you can bless a boot file. So in fact it is not working with iso9660, it is working with HFS+. Hybrid CDs are interesting. So it seems the only way to not use nvram settings for booting is with a blessed boot file, and that requires HFS/HFS+, and the current tools to manage that are apparently non-free. -- Len Sorensen
