I have a 2TB seagate drive that I use for TV shows and movies but I have noticed the write speed starts out fine and drops signifigantly. I first noticed when using dxtory to record that it was only getting a constant write speed of about 5 MB/s. I know this is incredibly slow. S.M.A.R.T. status shows everything as ok but I am wondering if this is the signs of early failure.
HD Tune benchmark:
HD Tune benchmark: