Persists with grub 2.02~beta2-36ubuntu3.8 on Ubuntu 16.04.2 LTS 4.4.0-66-generic:
# grub-probe --device / --target=fs_label grub-probe: error: unknown filesystem.
Persists with grub 2.02~beta2- 36ubuntu3. 8 on Ubuntu 16.04.2 LTS 4.4.0-66-generic:
# grub-probe --device / --target=fs_label
grub-probe: error: unknown filesystem.