On: Ultra-high-density hard drives made with graphene ...

[purpleidea]

> Spinning disks have 2 motors ... head driver

Wrong. One motor. The head moves with something called a voice coil. It's completely solid state. Open up a hard drive and watch it move back and forth while it's working. Of course this isn't good for the hard drive, but it looks basically instant to the naked eye. Very cool.

[beervirus → purpleidea]

Probably splitting hairs, but I’d still call it a motor. It transforms electric current into physical motion.

[agumonkey → beervirus]

true but the structure is simpler than the main disc motor

[bullen → purpleidea]

ok, I guess "moving part" would have been more precise, still the argument holds: that coil breaks.