Numerous circles form the tracks that make up a disk. The seek time is the length of time the read/write head needs to go from one track to another. The disk is split into a large number of circular tracks, and these tracks are further divided into units called sectors. Rotational Latency is the length of time it takes for the read/write head to rotate from its current position to the requested sector.
The time needed to place a particular sector under the read-write head is measured in milliseconds and is called rotational latency.
time it takes a disk drive to find a specific piece of information on a disk.
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