I've had a Drobo V2 (USB + FW800) for about year and a half. The fan has always roared. I contacted support while it was on warranty & they said it was normal. I just sucked it up after that. I've read people here and elsewhere saying their Drobos are dead quiet though. I'm jealous b/c I can't take the noise anymore. I have 4 drives in my Drobo: a 1TB Seagate 7200.11 that is moderate warm, a 1TB Hitachi Deskstar that is blazing hot, and two 500GB Seagates that are stone cold. So I'm putting the blame on the Seagate and Deskstar. Here is the rub: my Drobo is solely a backup device. During the day it is 100% idle. So I have no idea why the drives are even spinning. I'd think they would be sleeping. Anyway, are there some cooler running 1TB or greater drives that I can replace these with? Ones that will not activate the fan every 5 min?