Hard Drive Help

I’ve got a 30gb Quantum Fireball in my Mac G4 that suddenly won’t spin up. The Drive Setup doesn’t see it. Does anyone have any suggestions? Am I going to have to spend a huge amount to get the data recovered? Thanks in advance for any help.

Update – It does spin up, but the Mac won’t see it. So maybe it’s some kind of failure in the circuitry of the drive.