Version 1:
6.5 ms / 2 tracks = 3.25 ms/track = 3.25 ms/revolution
(1 rev / 3.25 ms) * (1000 ms / sec) * (60 sec / min) = 18462 rev/min
Version 2:
4.5 ms / track = 1 rev / 4.5 ms
(1 rev / 4.5 ms) * (1000 ms / sec) * (60 sec / min) = 13333 rev/min
Version 3:
35 ms / 7 tracks = 5 ms/track = 5 ms/revolution
(1 rev / 5 ms) * (1000 ms / sec) * (60 sec / min) = 12000 rev/min
Version 4:
20 ms / 5 tracks = 4.0 ms/track = 4.0 ms/revolution
(1 rev / 4.0 ms) * (1000 ms / sec) * (60 sec / min) = 15000 rev/min
Disk RPM – 2 marks