ADVANCED TUTORIAL of The Internal Structure of the Hard Disk Drive (HDD) and it Functions.

A hard disk is a sealed unit containing several platters in a stack. Hard disk (HDD) can be mounted in a horizontal or vertical position. In this description, the hard drive is mounted horizontally.
Electromagnetic read/write heads are located above and below each platter. As the platters spin, the drive heads move toward the center surface and edge. That way, the drive heads can reach the entire surface of each platter.
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