> Another interesting possibility would be to use the momentum of the spinning
> platters and motor assembly to power the drive electronics, simply by using the
> motor as a generator. When power fails during a write, use the current
> generated by the motor to finish the write.
Non-trivial because you'd have to adjust filters and code rate to the
actual platter speed (which goes down as energy is drained and moved
elsewhere) and design that beast to actually be a generator.
Probably too much development effort for a situation which should not
happen too often.
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