Booting normally, it drops my in a small shell... something like initframs, i'm not quite sure. Booting in recovery mode dropes me to the same shell but constantly writes out error messages. Something that had to do with a bad sector on /dev/sdb. So i said... ok. A fresh live usb flash would do the trick. I can run HDD utilities from it to repair things. WRONG. The live flash stumbled on the same error (seemingly).
After these errors the ubuntu logo appeared with the blinking dots that never finished blinking. The flash's light didn't indicate any activity on the data channels. Flash works fine on another pc though.