How to Find Average Rotational Latency?
Below are the steps to find average rotational latency:
- Find the RPM (Rotation Per Minute) given in the question.
- Then, find the time required for 1 rotation.
- After finding the 1 rotation time, use the formula: Average Rotational Latency = Time for 1 revolution / 2
Rotational Latency
The time required by the read/write head to move from the current sector to the desired sector is called the rotational latency. The rotational latency can be calculated by dividing the angle between the current sector and the desired sector by the rotational frequency.
The formula for calculating the rotational latency is given by:
Rotational latency = (angle between current sector and desired sector) / Rotational frequency
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