> Yes, documentation of firmware is almost unknown in my experience > (since probably 30 years ago). That's why I took the least invasive
It's documented to the extent that it says "implements UEFI" and that UEFI is documented. >> Same here (basically for the same reason: the behavior of the firmware >> and OS when faced with a disk that has both a GPT and an MBR partitions >> is largely unspecified and will vary depending on your system). > Eh? I've yet to see a GPT disk that didn't have a protective MBR. Exactly: what happens when a GPT disk has a real MBR (rather than a protective MBR) is "you're on your own". >> It's easy to reconcile: he doesn't say your setup is impossible or can't >> work, he just recommends not to do that because you may encounter >> unexpected difficulties. E.g. in theory an upgrade to your firmware or >> to one of your OSes could break it, tho in practice you're probably OK >> at least until you move that setup to another machine with >> a different firmware. > Not sure what you mean here. It's a laptop: nowt's going nowhere. Take the disk out, put it in another machine (laptop or desktop, it doesn't matter). Stefan