Longevity - each WD drive benefits from a range of WD technologies to ensure quieter, cooler and longer operation.
When did you purchase the drive ?
In the UK it was first available from Amazon on 10 April 2013 and there are only two reviews.
I suggest you see what results HD Tune provide:
http://www.hdtune.com/download.html
Select HD Tune not HD Tune Pro. You need to scroll down the page to see the HD Tune freeware link.
When you have installed click on the Info tab and select the drive you want in the box located top left using the scroll bar. What are the Supported and Active details displayed in the bottom right corner of the window? Also what is the temperaure top of the window?
Next click on the Health tab and check that each item listed has a an OK Status. Don't forget to use the scroll bar to see the bottom part of the list.