Warning output from update-grub

[krobe]

The following warning appears at the end of the output from update-grub

/usr/bin/grub-probe: warning: unknown device type nvme0n1.
done

This does not appear to cause a boot problem. However, I have seen other posts in the forum indicating it is related to having the file /etc/grub.d/60_memtest86+ , e.g., Warning from update-grub which either no longer applies or never did. Since I have no need for the legacy memtest86+, I have removed the memtest86+ package and verified /etc/grub.d/60_memtest86+ no longer exists (although /etc/grub.d/60_memtest86+-efi still does). The warning persists and although apparently harmless, it is unsettling since it references the boot device!

[dmt]

It’s caused by both /etc/grub.d/60_memtest86+ and /etc/grub.d/60_memtest86+-efi.

Found memtest86+ image: /boot/memtest86+/memtest.bin
/usr/bin/grub-probe: warning: unknown device type nvme1n1.
Found memtest86+ EFI image: /boot/memtest86+/memtest.efi
/usr/bin/grub-probe: warning: unknown device type nvme1n1.

So if you want to get rid of it completely, then also remove memtest86+-efi.

sudo pacman -R memtest86+-efi

However it’s harmless. I’ve had those warnings for years, ever since I got my first nvme drive.

[BG405]

@dmt

However it’s harmless. I’ve had those warnings for years, ever since I got my first nvme drive.

Probably just like those messages with the BTRFS version of GRUB reporting that the filesystem isn’t BTRFS.