TweakTown posted a review on the Western Digital Scorpio 2.5" 320GB HDD

While SSD or Solid State Disks are making their way in, we are still working with the current generation of storage and Western Digital has managed to do very well at increasing sizes and speeds.

The underside of the drive is extremely clean of high rise circuits and components, simply because they have been sandwiched between the top of the PCB and the lower casing of the drive. With this design you don’t have to worry about any short circuits or clearance issues.

Western Digital Scorpio 2.5" 320GB HDD Review