Important Points on Rotational Latency
- Rotational latency can be minimized if the sectors are adjacent.
- Rotational latency depends on the disk’s rotation speed given in RPM i.e., Rotation Per Minute.
- Rotational latency is also called as the Rotational Delay.
- The delay for the rotation of disk to bring the desired sector under read/write head is called rotational latency.
- The Rotational latency depends on the speed of the spindle of the disk.
- The number of sectors in one track can be covered in one rotation of the disk.
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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