You need a PC where you can hook directly to the SATA ports so you can run wdidle3.exe to disable Intellipark on Caviar Greens to fix the warm boot problem.
Also, when you need to run the drive maker's long test on a new drive before putting it into service or on a suspect drive to see if it's the problem or if something else is, or if you're dd'ing from one drive to another, you'll save yourself some time over having to go through USB adapters.
And if you work with S1s and S2s, it helps to have at least one IDE header on that motherboard as well.
Too busy TiVo wrangling to watch television anymore.