You can read more about TweakTown's Storage Product Testing Workstation and the procedures followed to test products in this article.
ATTO Baseline Performance
Version and / or Patch Used: 2.34
ATTO is used by many disk manufacturers to determine the read and write speeds that will be presented to customers.
Using ATTO to determine a baseline for performance, we see that the Western Digital Scorpio Black would get rated around 125MB/s read and 115MB/s write. It is hard to believe this level of performance is coming from a 2.5" platter drive. SSDs can hit higher speeds, but they can't be purchased for just over 100 USD or hold over 700GB of data.