A disk unit has 24 recording surface . It has a total of 14000 cylinders. There is an verage of 400 sectors per track. Each sector contains 512 bytes of data.
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400 sectors / track
512 bytes/sector
Rotational speed = 7200 rpm
7200 rotations →→ 60 sec
1 rotation?
= 60*1
______
7200 ROTATIONS
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120 rotations / sec
Data transfer rate = (120 rotations / sec) * (1 track / rotations) ** (400 sectors / track) ** (512 bytes / sector)
= 24576000 bytes / second
= 24.576 MB / second
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