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Storage capacity of magnetic disk depends on

  • A.tracks per inch of surface
  • B.bits per inch of tracks
  • C.disk pack in disk surface
  • D.All of above

Answer: D

Correct answer: All of above

Capacity is the product of all three: how closely the tracks are packed across the surface, how densely the bits are written along each track, and how many surfaces the disk pack contains. Improving any one of them increases the total, and the history of the hard disk is largely the history of packing all three more tightly.

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