Since a few days ago my machine is a bit unsteady and I got these few lines at booting (among others that always appeared saying; mtd device must be supplied (device name is empty)":
sd 1:0:0:0 [sdb] no caching mode page found
sd 1:0:0:0: [sdb] assuming drive cache: write through
I saw a possible solution in: https://askubuntu.com/a/884027/1619780 , but I am not sure if this is going to wipe my disk or if after doing it I will keep my files. I will do a backup just in case but I would like to avoid reinstall everything rigth now. In the solution is said "machine worked fine without re-installation" but still not a hundred sure if he meant to talk about the OS or OS+personal files.
Also, if any idea of the meaning of the other lines that appear... would be very appreciated! Thanks!