You might face that,
during vCenter reboot phase might appear below screenshot.
To fix problem you should:
- Take vCenter snapshot
- Press E immediately upon boot until
Grub boot startup appear
- Add systemd.unit=emergency.target
(that tells the OS to boot into emergency mode)
F10 to continue boot
About all of them you
need to launch these commands
e2fsck -y /dev/sda1
Finally, you need to
reboot
[original article]
https://www.tech-e.co.uk/vcenter-boots-into-emergency-mode-on-startup/