I've got a HP DL380 and after I leave it on for a while it decides it needs to run the fans at a much higher speed than it did before. It's really loud and annoying. Is there any way to manually control the fan speed? Or otherwise get it to stop doing that? Thanks.

edit: I guess i should have made it clear that this is a bit of a jury-rigged situation. I know the ideal solution is to put the thing in a server room with nice cool air. Unfortunately, that isn't happening. This is the sort of problem that calls for a jury rigged solution like

• manually setting the fan speed and accepting the fact that it's going to run hot
• shutting down a CPU (can i do that?)
• spinning down the disks when they're not in use (is that possible?)

solution: Install HP's system health monitoring daemon, hpasmd. I installed it to try to figure out what was going on, and just running it fixed the problem.