Ah right yeah I think the ST33BLAHBLAH is the old HDD. Nothing too important on there I was just using it as a back up. I'm guessing the WDC drive is my Caviar too so that's good.
The ST33 hard drive is a Seagate I think and yes the WD(1002FAEX for the 1TB will be the Caviar black.
You can run the diagnostic programs from manufacturers websites to check the status of your drives,but the S.M.A.R.T warning is usually spot on.