Ubuntu 16.04 Gave up waiting for root device on boot?

Question

GRUB

Good afternoon, actually today after a reboot, when starting ubuntu, the following error occurs:

When booting from livecd, ubuntu perfectly sees all hard drives.
I tried according to the manuals from Google, but the result is 0.
upd: there are two hard ones, on one w7, on the second ubuntu

Answer 1

Check the UUID of the root partition. Edit /etc/fstab if necessary and reinstall grub2.