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Suppose you have a hard drive that spins at 9000 RPM, and has 100 sectors of...

Suppose you have a hard drive that spins at 9000 RPM, and has 100 sectors of 512 bytes each on a particular track. If the head is already in position when a request for a single sector of that track is serviced, what is the expected effective data rate to get the data into the controller’s buffer? Give the answer in Bps, with 3-4 significant digits.
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Answer #1

--> Given hard drive that spins at 9000 RPM. means 9000 revolutions per minute

--> So, for second It will be :

      9000 / 60 = 150

--> Each revolution It serves a track which has 100 sectors of 512 Bytes each.

--> So Total transfer is :

       150 * 100 * 512 Bytes / Sec

    = 150 * 50 KBytes / Sec

    = 7.3242 MBytes / Sec

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