From the course: CompTIA A+ Core 1 (220-1201) Cert Prep

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Magnetic disk drives

Magnetic disk drives

From the course: CompTIA A+ Core 1 (220-1201) Cert Prep

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Magnetic disk drives

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- This, my friends, are the inner workings of a classic hard disk drive. These big, round, shiny things you're looking at are platters, and while you can't see it, they actually store ones and zeros through little teeny tiny bits of magnetism, incredibly small. We read this, and if I give it a little electricity, you can actually see this happen, by this little arm that's going to go back and forth. This arm is going back and forth. It is within nanometers of contact, but it isn't actually touching the platters themselves, so that little read-write head picks up the ones and zeros or sets them down, depending on what your needs are. Now, you can't see this because you can't see magnetism, but if you could see magnetism, you'd see that it stores in the little atom, the most smallest amount it can store is what we call a sector, and it would look something like this. Hard disk drives have been around for ages, and one of the things that's challenging about it is that there's gone…

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