Solid State Drives, by contrast, have no moving parts. It’s as much a mechanical process as it is a digital one. When you want to write or read data from a magnetic HDD, the platters spin, the head seeks, and the data is located. It is, of course, quite a bit more complicated than that, but suffice to say that the analogy of an automatic record player arm seeking out a track on a record is not far flung from the actuator arm and head of a HDD seeking out data. Data is stored by changing the polarity of the magnetic bits on the surface of the platters. The surface of the magnetic platters is written to by a tiny little mechanical arm (the actuator arm) with a very fine tip (the head). Those platters spin on a spindle (much like a record spins on a turn table). An HDD is, at its most simple, a set of metal platters coated with a ferromagnetic material. So what exactly is a Solid State Drive? First let’s go over what a traditional Hard Disk Drive (HDD) is. Throughout the 2000s, the price of flash memory continued to fall, and by the end of the decade, consumer Solid State Drives were making inroads in the personal computer market. In the 1990s, Flash-based SSDs made an appearance but were still far too expensive for the consumer market and made hardly a blip outside of specialized computing circles. The earliest were RAM-based and were so cost-prohibitive as to make appearances only in ultra high-end and super computers. SSDs have been around for decades in various forms. This might be hard to believe, but Solid State Drives are actually fairly old technology.
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