CYwolf told me about a neat tool that reads the low-level diagnostic information in your hard drive so you can see how well it is performing and if it is about to go bad. Apparently most drives have the S.M.A.R.T.* support necessary to report this diagnostic information. Some tools that can read S.M.A.R.T. data are SpeedFan and DiskCheckup. Well, after checking out my drives, the Western Digitals are all fine. A few bad sectors here and there, and a handful of read/write errors. No big deal. SpeedFan gives them a Fitness value of 90% or higher. The 160 GB Maxtor SATA drive? The one I thought might be giving me troubles in my last install of Windows? Fitness of 38%! Soft read errors -- the kind it can correct, but still -- everywhere! CRC errors in the controller! It's even getting close to the bad sector limit. This is the hard evidence I needed to RMA the drive. Hopefully it's the drive itself and not the model... I can't get a refund from Newegg at this point: they'll just send me a new drive. In the future I think I'll be buying Western Digital instead of Maxtor. This is my first Maxtor to go bad** but the Western Digitals perform so much better and make the same amount of noise. * S.M.A.R.T means Self-Monitoring, Analysis and Reporting Technology. More information on google and at everything2. ** I have some that are over five years old!