The 1.5 TB Seagate drives have been plagued with problems.
Funny you should say that; that was the first thing that came to mind when I saw this thread. These 1.5TB drives have been failing en masse, and it's really unfortunate because Seagate used to mean quality. I have a 7-year old Dell, and the original 40GB Seagate hard drive is still chugging away happily after all these years. WD has been good to me as well; I had a 9GB WD drive last about 8-9 years in an even older Dell (P3, Windows 98), and the WD drive in my PC has worked nicely since 2004.