I just RMAed a 250 GB WD RE4 drive and was very surprised when the replacement drive they sent me died during my raid 5 rebuild. Now I can't get any of the sata controllers I have to recognize it. Even worse, when I inspected the drive afterwards I noticed that the controller board on the HD showed noticeable signs of corrosion, which I assume is what lead to the death of the drive. Has anyone else had any problems like these?