I have a long-standing dual boot windows/manjaro pc and after a bios update I noticed it was skipping grub on boot. I went to do the usual grub restore but realized that an /boot/efi drive no longer exists and that the update completely formatted what I believe to be manjaro’s efi partition:
> Device Start End Sectors Size Type
> /dev/sdb1 2048 1023999 1021952 499M Windows recovery environment
> /dev/sdb2 1024000 1228799 204800 100M EFI System
> /dev/sdb3 1228800 1261567 32768 16M Microsoft reserved
> /dev/sdb4 1261568 1751336936 1750075369 834.5G Microsoft basic data
> /dev/sdb5 1751336960 1752440831 1103872 539M Windows recovery environment
> /dev/sdb6 1752442880 1953523711 201080832 95.9G Linux filesystem
The partition in question should be between sdb5 and sdb6. Gparted shows it as 1.00Mib unallocated space.
Not many solutions online seem to address a formatted partition. Is there any way of recovering this or recreating it?
It’s highly unlikely a BIOS update would resize/reformat/merge your partitions. 1Mib is far too small to be an unformatted EFI partition. It’s more likely your the letter assignments have been changed, as in sdbX. You have an EFI partition at /dev/sdb2.
I had a look around for more details on the efibootmgr command and found this from another post:
sudo manjaro-chroot -a ( type 1 if only one line 0 )
efibootmgr -c -d /dev/sdxy -p 1 -L "Manjaro" -l "\EFI\Manjaro\grubx64.efi"
exit ( for end chroot )
Followed the Manjaro GRUB/Restore steps after that, switched my BIOS load order, removed CSM, and updated grub to display both windows and manjaro in the grub menu.
I thought my manjaro had its own separate efi partition before the bios update - since everywhere states that a fat32 should be before manjaro’s ext4 - but I guess not. It’s all working properly now. Thanks for the help!
Every time I update my BIOS, I have to reinstall GRUB from live USB with manjaro-chroot, after that I can boot to GRUB and load Manjaro, or else I have a black screen with “GRUB calloc error” or something like that if I boot to the disk, and also Manjaro doesn’t appear as boot option in BIOS. Don’t know if this is intended but for sure it is reproducible.