2/4     My external hard drive (not used) is starting to emit
        a ticking sound every 5-10 seconds even though I'm not
        reading or writing anything. It used to be quiet. Is
        this a sign that it's about to fail?
        \_ would have to hear it to be sure, but it certainly
           is likely.
        \_ nothing in the bg doing anything? is this while plugged into the
           computer or not?
           \_ it's doing this even though I'm not mounted, so
              I'm getting a bit worried. It never did this before.
              BTW it's a WD-1TB green drive.
              \_ check SMART status?