[Sonic Blue Meanie]

I've got a Lacie d2 Quadra Making a noise repeatedly. Hard to describe, but sort of a little 2 second spinning noise that starts and stops, but repeats continuosly. I think it might be the fan because I can feel a little pulsating air movement when I put my hand to the vent.

Ready to spring for a Glyph, but had to check in here first just in case. Also wondering if the power supply might be failing?