I faced the same issue today, and googling this page helped me alot, 

i first try to run e2fsck /dev/sda1  this gives me no error

then i try to run e2fsck /dev/sda2 this shows me bad super block but i was unable to fix it

then i run e2fsck -y /dev/sda2 nothing happen

by running journalctl command and scrolling till last i found that /dev/sda3 is corrupted, 

e2fsck -y /dev/sda3 

this command fixed my issue

Thanks