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A disk has $20$ sectors per track. Assume there are $512$ bytes per sector. What is the data transfer rate (in bytes per second) at a rotational speed of $7200$ rpm?

  1. $1.26 * 10^8$ bytes/second
  2. $1.58 * 10^6$ bytes/second
  3. $1.318 * 10^5$ bytes/second
  4. $1.2288 * 10^6$ bytes/second
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The data transfer rate is (20 * 512 * 7200)/60 = 1. 2288 * 10^6 bytes/second
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