I had a maxtor once, and it shuts downs like an aircraft engine stops, i use ti think that it might be the processor's fan niose, so i never noticed it seriously, once I have to remove hard drive as I applied new thermal pad to my processor, and runned it for 2 hours as burn-in time without booting, and to my surprise, CPU's fan wasnt making a noise, then I came to know its the H/D that let others know that yes, I have shut down my system. as Now I have 4 times more powerful machine as before, and accordingly it shuld make more noice due to fans as its hotter, but its 3 times as quiet as my previous system, just because I am using S-ATA's this time and none of them is Maxtor.