7
2
If you know the RPM, then how do you calculate the rotational latency?
Phenom
Posted 2010-03-12T07:45:14.850
Reputation: 6 119
How do you calculate the rotational latency of a hard drive?
Answers
7
(1 / (RPM / 60)) * 0.5 * 1000
Or, in other words:
30000 / RPM
Result in ms.
Alex
Posted 2010-03-12T07:45:14.850
Reputation: 2 094
1That would be the average rotational delay. The maximum would be twice that. – Phenom – 2010-03-13T05:11:01.683
why 0.5 * 1000? – The Room – 2018-10-17T06:37:49.487
See this set of 6 closely related questions: http://superuser.com/questions/119446/sectors-and-clusters http://superuser.com/questions/119051/transfer-time-for-a-file http://superuser.com/questions/107723/hard-drive-sectors-vs-tracks http://superuser.com/questions/119048/number-of-tracks http://superuser.com/questions/119026/rotational-latency http://superuser.com/questions/119030/bytes-per-track
– Jonathan Leffler – 2010-03-16T11:06:09.087And http://superuser.com/questions/120461/transfer-time-of-a-cylinder
– Jonathan Leffler – 2010-03-16T11:13:55.340