/boot/efi deve ser um FAT32 "partição do sistema efi" (ESP), consulte também link
Eu tenho um problema estranho em carregar com o grub2 e o efi no gentoo. Talvez eu tenha perdido alguma coisa, mas estou tentando fazer isso:
# mkdir /media/gentoo
# mount /dev/sda8 /media/gentoo/
# mount -t proc none /media/gentoo/proc/
# mount --rbind /dev/ /media/gentoo/dev
# mount --rbind /sys/ /media/gentoo/sys/
# chroot /media/gentoo/ /bin/bash
# env-update
>>> Regenerating /etc/ld.so.cache...
# source /etc/profile
#
...
# parted -l
Model: ATA ST500LM000-SSHD- (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Warning: failed to translate partition name
Warning: failed to translate partition name
Warning: failed to translate partition name
Warning: failed to translate partition name
Number Start End Size File system Name Flags
1 1049kB 1050MB 1049MB ntfs hidden, diag
2 1050MB 1322MB 273MB fat32 boot, hidden, esp
3 1322MB 2371MB 1049MB fat32 hidden
4 2371MB 2505MB 134MB Microsoft reserved partition msftres
5 2505MB 108GB 106GB ntfs Basic data partition msftdata
8 108GB 459GB 350GB ext4
6 459GB 485GB 26.8GB ntfs Basic data partition msftdata
7 485GB 500GB 14.7GB ntfs hidden, diag
...
# mount /dev/sda2 /boot/efi/
# grub2-install --target=x86_64-efi --recheck --debug
....
grub2-install: info: copying '/boot/grub/x86_64-efi/core.efi' -> '/boot/efi/EFI/gentoo/grubx64.efi'.
grub2-install: info: Registering with EFI: distributor = 'gentoo', path = '\EFI\gentoo\grubx64.efi', ESP at hostdisk//dev/sda,gpt2.
grub2-install: info: executing efibootmgr --version </dev/null >/dev/null.
grub2-install: info: executing modprobe -q efivars.
grub2-install: info: executing efibootmgr -b 0003 -B.
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0002,2001,0001,2002,2003
Boot0000* EFI USB Device (UFD 2.0 Silicon-Power8G)
Boot0001* Lenovo Recovery System
Boot0002* Windows Boot Manager
Boot2001* EFI USB Device
Boot2002* EFI DVD/CDROM
Boot2003* EFI Network
grub2-install: info: executing efibootmgr -c -d /dev/sda -p 2 -w -L gentoo -l \EFI\gentoo\grubx64.efi.
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0003,0002,2001,0001,2002,2003
Boot0000* EFI USB Device (UFD 2.0 Silicon-Power8G)
Boot0001* Lenovo Recovery System
Boot0002* Windows Boot Manager
Boot2001* EFI USB Device
Boot2002* EFI DVD/CDROM
Boot2003* EFI Network
Boot0003* gentoo
Installation finished. No error reported.
# grub2-mkconfig -o /boot/grub/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/kernel-genkernel-x86_64-3.17.8-gentoo-r1
Found initrd image: /boot/initramfs-genkernel-x86_64-3.17.8-gentoo-r1
Found Windows Recovery Environment (loader) on /dev/sda3
Found Windows 8 (loader) on /dev/sda5
done
# efibootmgr -v
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0003,0002,2001,0001,2002,2003
Boot0000* EFI USB Device (UFD 2.0 Silicon-Power8G) ACPI(a0341d0,0)PCI(14,0)USB(1,0)HD(1,203f,efe782,c3072e18)RC
Boot0001* Lenovo Recovery System HD(3,276800,1f4000,478687c7-6120-42c7-93ab-5e3103e1b9ee)File(\EFI\Microsoft\Boot\LrsBootMgr.efi)RC
Boot0002* Windows Boot Manager HD(2,1f4800,82000,025a7d4d-2436-4fec-8e12-c34679d2d76b)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...{................
Boot0003* gentoo HD(2,1f4800,82000,025a7d4d-2436-4fec-8e12-c34679d2d76b)File(\EFI\gentoo\grubx64.efi)
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC
Mas depois da reinicialização, vejo o carregador do Windows 8 novamente. Como posso descobrir, o que está errado (qualquer registro ou mensagem de depuração)? Ou talvez você possa ver que há algum erro estúpido? Eu já fiz essa pergunta no fórum do gentoo , mas talvez eu tenha mais sorte aqui.
UPD : a opção "Inicialização segura = Ativada" foi uma das causas.
/boot/efi deve ser um FAT32 "partição do sistema efi" (ESP), consulte também link