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How Hard disks Work – On your computer’s hard disk, there are actually no iron nails. There are only large shiny circular “plates” of magnetic material called plates, divided into billions of tiny areas. Each of these areas can be independently magnetized (to store 1) or demagnetized (to store 0). Magnetism is used in computer storage because it continues to retain information even when the power is turned off. If you magnetize your nails, they will remain magnetized until you demagnetize them. In much the same way, the computerized information (or data) stored on the Hard disk of your PC or iPod remains even when you turn off the power.
How Hard disks Work
How Hard disks Work
The platter is the most important part of the Hard disk. As the name suggests, they are disks made of a hard material such as glass, ceramic, or aluminum, which are coated with a thin layer of metal that can be magnetized or demagnetized. Small hard drives usually only have one platter, but each side has a magnetic coating. Larger drives have a series of plates stacked on a central spindle, with a small gap between them. The platters spin at up to 10,000 revolutions per minute (rpm) so the read-write heads can access any part of them.
There are two read-write heads for each platter, one to read the top surface and one to read the bottom, so a Hard disk having five platters (say) would need ten separate read-write heads. The read-write head is mounted on an electrically controlled arm that travels from the center of the drive to the outer edge and back again. To reduce wear, they don’t actually touch the plate: there is a layer of liquid or air between the head and the surface of the plate.
That’s a brief understanding of how a hard disk works from me, hopefully this article can help those of you who are looking for information about how a hard disk works. That’s all from me, sorry if there are any wrong words from me as the author of this article and thank you for taking the time to visit the articles I made and for visiting our my method website.
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