a) Access time
b) Average seek time
c) Seek time
d) Rotational latency time
Answer: d
Explanation: Rotational speeds of disks today range from 5400 rotations per minute (90 rotations per second) up to 15,000 rotations per minute (250 rotations per second), or, equivalently, 4 milliseconds to 11.1 milliseconds per rotation.
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