Ubuntu 26.04 LTS. Desktop PC.
My PC suffered a sudden power loss a few days ago and now goes through a prolonged process before it finally allows booting in to the OS.
The display seems to be indicating errors caused the power loss. I want to check it for errors, but I'm told I need to unmount it first.
How do I unmount the drive where the OS is located? Will my PC still operate?
This is a bit of what the displays shows:
