http://www.anandtech.com/show/6083/wd-introduces-red-nas-optimized-hdd-line
And now there's another line to add to that list: Red. Designed specfically to be used in 1-5 bay NAS devices, the Red line has hardware and software features that make it suited for that particular climate, while delivering impressive performance and reliability. WD has worked with major NAS manufacturer's to ensure compatibility with as many common NAS products as possible, and has a list of the tested devices here.