In my experience, almost all HD manufacturers have problems with their first runs of any HD. I usually wait 3-4 mos until I feel all (most) of the bugs are worked out of assembly and QC. I once had 4 out of 6 WD Caviar 6.4's die in 1 week, They were bought 2 weeks after they were released. Returned them all, waited a few more weeks, bought 6 more, all perfect. Have never had a problem since.