Recently I have been installing server by this
Due to limited time I wasn't able to install it in one day, so I installed it until Page 6, then turned it off by typing shutdown -h 0, after that, today, I turned it off, it showed GRUB boot screen and after that it wen't black. Then I booted in to recovery mode and got this screen.
Checked UUID and it is right, althought raid name changed from md1 to md126
Also I googled for solution, but nothing works.