G5 noisier under linux than firmware or OSX

[Chris Friesen]

I've noticed that when booting, right around the time the kernel first 
accesses my disks the fan speed jumps a bit.  It's not full-on vacuum 
cleaner howling, just a bit noisier.

I've only got the one machine so I can't do A/B comparisons, but it 
seems to be quieter when running OSX.

Is linux using the same fan speed parameters, or are we maybe a bit 
conservative?

Chris