Monthly Archive for: ‘January, 2018’

Hard Drive Evolution Part IV


When we last saw our hero the hard drive he had shrunk down to what we now call the large form factor with a 3.5” case with the higher performance 10,000 and 15,000 RPM drives using even smaller platters to keep their power consumption under control. Features that used to be limited to high-performance drives like voice coil positioners and …

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Hard Drive Evolution Part 3


Stepper Motors to Voice Coils The first 5 ¼” hard drives like the ST-506, used a stepper motor to move the heads in and out. The head carriage was attached to a split steel band so each step of the motor in or out would define a track. Stepper motors were cheap, but even by the measure of those washing …

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