If you know the RPM, then how do you calculate the rotational latency?

(1 / (RPM / 60)) * 0.5 * 1000 Or, in other words: 30000 / RPM Result in ms. 



(1 / (RPM / 60)) * 0.5 * 1000 Or, in other words: 30000 / RPM Result in ms. 

