Since a few days ago, my computer freezes while I sync my internal hdd with an external WD Passport 1TB drive (3months old). When the keyboard gets temporarily a bit responsive I am able to switch to another terminal (Ctrl+Alt+F2) and I see the following image repeating continuously. I am on Ubuntu 11 using LuckyBackup.
What is going on? Is my hdd defective? Is it the external one? Something else?