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The question given below concern a disk with a sector size of $512$ bytes, $2000$ tracks per surface, $50$ sectors per track, five double-sided platters, and average seek time of $10$ milliseconds.

If the disk platters rotate at $5400$ rpm (revolutions per minute), then approximately what is the maximum rotational delay?

  1. $0.011$ seconds
  2. $0.11$ seconds
  3. $0.0011$ seconds
  4. $1.1$ seconds
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$60$ sec =$5400$ revolutions

1 revolution = $\frac{60}{5400}$ = 0.011sec which is maximum rotational delay

If average is asked then it is half of the maximum rotational delay

Option A) is correct 

Answer:

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