Can not update-grub

Support
1

I accidently deleted EFI partition and I can not boot anymore. I tried to recover with this topic (Deleted efi partition - #3 by Bitmap), but when I want to run update-grub, I get an error

[manjaro ~]# manjaro-chroot -a
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
==> Mounting (ManjaroLinux) [/dev/sda4]
 --> mount: [/mnt]
 --> mount: [/mnt/boot/efi]
[manjaro /]# grub-install --recheck --no-rs-codes
Installing for x86_64-efi platform.
Installation finished. No error reported.
[manjaro /]# update-grub
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/manjaro/theme.txt
Found linux image: /boot/vmlinuz-5.15-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
ERROR: mkdir /var/lock/dmraid
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
Adding boot menu entry for UEFI Firmware Settings ...
Root filesystem isn't btrfs
If you think an error has occurred, please file a bug report at "https://github.com/Antynea/grub-btrfs"
Found memtest86+ image: /boot/memtest86+/memtest.bin
done

Any idea?

2

I think:

You deleted the EFI partition, reformated it and now it has a different UUID.
blkid and then put the new UUID to etc/fstab.

1 Like
3

I think I did. Here is the full flow:

Create partition with KDE Partition Manager like

partition
partition1366×768 96.7 KB

run:

sudo su -                                                                                      ✔ 
[manjaro ~]# manjaro-chroot -a
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
==> Mounting (ManjaroLinux) [/dev/sda4]
 --> mount: [/mnt]
 --> mount: [/mnt/boot/efi]
[manjaro /]# nano /etc/fstab

fstab
fstab1366×768 95.2 KB

run

[manjaro /]# grub-install --recheck --no-rs-codes
Installing for x86_64-efi platform.
Installation finished. No error reported.
[manjaro /]# update-grub
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/manjaro/theme.txt
Found linux image: /boot/vmlinuz-5.15-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
ERROR: mkdir /var/lock/dmraid
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
Adding boot menu entry for UEFI Firmware Settings ...
Root filesystem isn't btrfs
If you think an error has occurred, please file a bug report at "https://github.com/Antynea/grub-btrfs"
Found memtest86+ image: /boot/memtest86+/memtest.bin
done
[manjaro /]#
4

I realized that what I wrote was largely incorrect and rubbish - not good advice
so I deleted it - sorry for having wasted your time.

You did run it.
TBH, to me that all looks like this all worked. Despite the errors displayed.

5

Perhaps one of these, booted from USB-Stick can help?

Google for them:

boot-repair-disk-64bit.iso
systemrescue-9.04-amd64.iso

I use ventoy that you can find with pamac to have all these on my rescue USB-Stick.

6

Not really a solution, but I ended up installing Manjaro fresh with GUI. But thanks anyway for your effort.