<There's always the well-known kludge method. You get a 3-phase motor <somewhat larger than the one you want to run (any such induction motor <should work). You energise one winding from single-phase mains, using a <capacitor to generate enough phase shift to another motor winding for it <to start and run. Then use all the motor terminals as a 3-phase output to <the motor you want to run. Effectively this new motor becomes a rotary <converter. < <I assume the motors in disk drives are not that large, so this may well <work. It's certainly been done for (small) lathe motors. I've seen this done for motors in the 3-5HP range! Allison