My system has two efi boot partitions on separate drives. I rarely boot to Windows and I wanted it on its own completely separate drive. I configured a default in the firmware settings and then for a while I would choose an alternate when I needed to by hitting a key to bring up the efi boot menu. Eventually I got around to adding a boot entry for my second (WIndows) drive to grub on the main drive and now I can just select Windows from grub if I need to boot into it.
On Mon, 2020-06-01 at 20:13 +0200, Patrick Dupre wrote: > Hello, > I guess that very think is more or less, OK, I have just some > difficultiesto understand the logic. > > How does the efi firmware decide which /boot/efi to use as the > > source when the computer is started > > I realized that I have only one EFI System Partition on sdaBy > default, the system goes to grub, where I can choose the OS.I do not > use the efi options to go there (at least intentionally). > > Does it have to be selected from the efi firmware menu at each > > boot? > I do not think so. As I said, I go directly to the grub menu (by > default).I guess that if I active the efi menu, I could choose other > options to boot. > > ===================================================================== > ====== Patrick DUPRÉ | | email: > pdu...@gmx.com > Laboratoire interdisciplinaire Carnot de Bourgogne 9 Avenue Alain > Savary, BP 47870, 21078 DIJON Cedex FRANCE Tel: +33 > (0)380395988========================================================= > ================== > > > On Mon, 1 Jun 2020 10:10:41 -0400Jonathan Billings < > > billi...@negate.org> wrote: > > > If you see in the Fedora entry, it has:HD(3,GPT,a5c3bc11-e83b- > > > 48d0-be96- > > > 783af37228f1,0x2001800\,0xfa000)/File(\EFI\FEDORA\GRUBX64.EFI) > > > That means to look for a volume with the 3rd GPT partition, with > > > theUUID of a5c3bc11-e83b-48d0-be96-783af37228f1 (and some other > > > data).On that disk, look for the /EFI/FEDORA/GRUBX64.EFI > > > executable(remember, this is a DOS filesystem so it's case- > > > insensitive). > > > Run 'blkid' on a running system, and you'll see that the PARTUUID > > > ofthe EFI volume matches the UUID in the above EFI entry. > > > You can have an EFI volume on multiple disks. EFI also > > > supportsthings like network boot, which has a different syntax > > > EFI entry. Theefibootmgr command does a lot of the hard work of > > > figuring that outfor you, so you don't need to manually enter > > > that information. > > You seem knowledgeable, so I'll ask you. How does the efi > > firmwaredecide which /boot/efi to use as the source when the > > computer isstarted? Does it have to be selected from the efi > > firmware menu ateach > > boot?_______________________________________________users mailing > > list -- users@lists.fedoraproject.org > > To unsubscribe send an email to users-le...@lists.fedoraproject.org > > Fedora Code of Conduct: > > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > > List Guidelines: > > https://fedoraproject.org/wiki/Mailing_list_guidelines > > List Archives: > > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > > > _______________________________________________users mailing list -- > users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: > https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
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