How a Hard Drive Works | ExtremeTech

Even if you’re a self-proclaimed computer geek who can build a PC from components, do you really know how a hard drive operates?


The head must be able to accurately seek a magnetic region that is just a few nanometers wide while the disk spins at thousands of revolutions per minute. That certainly could not be done with a normal motor — and in fact, hard drive heads are moved with a voice coil actuator, much in the same way that a cone in a speaker is moved to make sound…

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