Why SSDs are needed and are hard drives dead?


An SSD drive is a data storage device just like a traditional hard drive. Externally, an ssd drive can look a lot like a 2.5 inch laptop drive (SATA version). The main difference is where and how the data is written.

In a normal hard drive, the data is written to a special plate covered with a magnetic layer of material. Each manufacturer has its own "recipes", but the general principle is similar for all - inside the device there is a rotating disk (with a considerable speed, usually 5400 or more revolutions per minute), one or more. Over the surface of the disk moves a magnetic head (similar to a vinyl record player) and reads or writes data.

What are SSDs for and are hard disks dead?

All these mechanics are very vulnerable to mechanical effects like jolts and bumps. Especially during operation when the head is a few microns above the surface - less than the thickness of a human hair. When an impact occurs, the magnetic head assembly meets the surface, the surface is scratched and the disk ceases to function properly. As a result, a lot if not most hard drives fail not by themselves, but from external influences.

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