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Hard drive teardown

engineerguy · Youtube · 8 HN points · 1 HN comments
HN Theater has aggregated all Hacker News stories and comments that mention engineerguy's video "Hard drive teardown".
Youtube Summary
Bill opens up a computer hard drive to show how it is engineered. He describes how the "head" reads the magnetic information on the disk; reveals how a voice coil motor and a slider controls the position of that head. He also discusses how smooth a disk must be, and briefly mentions a mathematical technique that allows engineers to pack more information on a drive.
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Hacker News Stories and Comments

All the comments and stories posted to Hacker News that reference this video.
Jun 18, 2014 · 5 points, 0 comments · submitted by thewarrior
Can you please explain why hard-drives follow a flying head approach? Why don't they just perpendicularly fix the reader above the disk, rotate the disk and then use a linear actuator to move the reader back and forth - exactly like optical drives?

The read/write arm needs speed and extremely fine-tuned movement that can't be had from a mechanical actuator. See: https://www.youtube.com/watch?v=Wiy_eHdj8kg

Jun 07, 2011 · 3 points, 0 comments · submitted by redslazer
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