How impressive are hard disks?

hard-disk-platter-and-head

Via Kottke:

If the read-write head [of a hard disk] was a Boeing 747 and the hard disk platter was the Earth then:

  • The head would fly at Mach 800,
  • At less than one centimetre from the ground,
  • And count every blade of grass.

Now that’s impressive.

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