Hello, I've had a puzzling experience with the old PowerMac G4 MDD, a noisy machine, and a recent external hard drive. When I connect the HD via FW800 or FW400, the fan noise is seriously reduced, and stays quiet until I remove it (still when the drive is ejected but still connected). I've tested the temperature monitor with this and the HD seems to have little or no effect, so the fans are still apparently doing their job. If someone knows of a way to reproduce this quieter performance, at a configuration/settings level, without leaving the HD always connected, that would be awesome. I've already enabled nap mode, and I think the G4 had its fans exchanged under the old recall program, but the noise level's still pretty high.