Hard Disk
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Title: Hard Disk

Essay Details:

Subject: Technology
Author: Michael D
Date: November 17, 2014
Level: University
Grade: A
Length: 12 / 3383

Essay text:

The circle closest to the outside is much bigger than the circle closest to the center. Since each metal platter has a top and bottom surface, there are at least two magnetic circles for each size and location. However, a disk may have as many as five platters, producing ten of these identical circles at the same distance out from the center. There is a separate magnetic read/write head for each disk surface. With five platters there are ten heads. They are all fixed on metal "arms" that can move the head from the innermost to the outermost circular position on the disk surfaces. The arms all move together, so if there are 10 disk surfaces the read/write heads are in the same location on all 10 surfaces simultaneously...

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