A couple of days ago, I launched on my Ubuntu 16.04 LTS laptop
username@username~$ > sudo apt upgrade
, then minimized the terminal and after a while turned off the laptop, forgetting to check whether the terminal completed the command. The next time I turned on the laptop, as always grub met me, I typed
as always and chose the fourth option in Boot Manager (as always) (UEFI Onboard LAN IPv4 (50-9A-4C-B3-C9-0B)).
I expected that, as always, the Unity shell would meet me, I would enter my password and start working. But this did not happen, I got 3 errors, after which grub instantly appeared. I did not even have time to read what kind of errors. I recorded these errors on the camcorder and looked at the pause what errors they were and read them:
error: failure reading sector 0x0 from `cd0' error: failure reading sector 0x0 from `cd0' error: no such device: b3e461d6rced4-45a8-afe4-2094d34ae956
That is the problem, I cannot start the system.
What I tried to do to solve the problem: I don’t understand this, but I saw a tip on the site to make a bootable USB flash drive: I made it with Ubuntu 16.04.6 (Downloaded from the official Ubuntu site). I started the laptop with it, chose Try Ubuntu without installing, but at the end a black screen was highlighted and nothing happened (I left the laptop for 30 minutes, but nothing changed).
After that, I turned off the laptop and selected Check disk for defects. The result showed Check finished: errors found in 7 files!.
The other options in Boot Manager is:
HDD1-ubuntu (TOSHIBA MQ01ABD100)
HDD2-ubuntu (TOSHIBA MQ01ABD100)
UEFI Onboard LAN IPv6 (50-9A-4C-B3-c(-0B)
First one returning me the same errors as fourth (which I tell about the beginning of this text)
Second one returning me the menu with 4 options:
Advanced options for Ubuntu
Restore Ubuntu 16.04 to factory state
If I choose ‘Ubuntu’, then I have a blinking capslock indicator and about of 20 lines of text, in which the last one is
[ 0.721315] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on onknown-block(0,0)
and after this nothing happened.
Third one returning me the same errors as fourth (which I tell about the beginning of this text).