I thought i would be a Maxtor...
Check the temperture of the HD with one of the tools here:
http://www.pchelpforum.com/forum/index.php?topic=1035.0
I think it will be running pretty hot ,maxtor's are known for that.
And even though it is only 8 months old it could die soon if it's been running at a too high temperture.
The best thing you can do is back everything up and take it back to the shop since its still under warrenty.