Stephen Berman composed on 2019-05-14 00:25 (UTC+0200):
On Mon, 13 May 2019 22:47:13 +0200 "Carlos E. R." wrote:
When there is no separate /boot partition, it simply a normal directory, /boot :-)
And each "/" root has a /boot.
And each /boot mounts the same efi, as /boot/efi
Ok, so no separate /boot partition, but there has to be an EFI partition,
Absent one, you won't be booting any UEFI installation.
which will be mounted in each system at /boot/efi, right?
That's the convention, but having more than one installation doing so is not necessary. IOW, the one that routinely does mount it there will be the one in control of each initial handoff from the BIOS after POST. If you do routinely keep more than one installation mounting it there, you'll be forced into some sort of routine to respond to one's kernel update process usurping control from the one not you wish to keep in control. If you don't care which is in control, then it should matter to keep them all mounting it there. On mine, only on TW is it routinely (if ever) mounted there. If you wish access to it regardless of what you have booted, simply mount it elsewhere on all but one.
Must the EFI partition be the first disk partition or can it be anywhere?
It can be anywhere, but first is a good convention.
Do you happen to know whether, if I start with a clean disk in an EFI-enabled machine and let the openSUSE installer propose a partition scheme, it will include the EFI partition?
If perfectly clean, yes, assuming the installer actually gets booted in UEFI mode. With CSM fully disabled, and booted into the installer's UEFI mode, I would call it a bug worthy of report if it does not. It's not something testable here without violating my strict convention. My partitioning is always complete before an installer is started on it.
I disabled the UEFI CSM support in the BIOS, which IIUC means the computer is using pure EFI. I was prepared to not be able to boot either Leap or TW anymore, but in fact AFAICT nothing has changed: the GRUB2 menu appears just as before and both systems boot fine. Of course I didn't reinstall GRUB2; does that mean the systems are still booting in legacy mode even though this is disabled in BIOS -- is that even possible?
I don't know... You got me more confused.
¡Qué lástima! :-(
I never did figure out where in this thread you got convinced that you might not be booting either installation in UEFI mode, ie. confusion here too. :-p -- Evolution as taught in public schools is religion, not science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org