Advantages of SSD over HDD are obvious

If we talk about performances and trying to compare Hard Disk Drive vs Solid State Drive, I think that there is no doubt that SSD is an absolute winner. Still, even today so many people like to compare HDD vs SSD, which is the reason why I’m writing this post.

I think it is worth mentioning all the benefits that come with a new SSD. For so many years HDD was the leader in the whole computer industry. Only a few years back, SSD came. Shyly at the beginning, but in a short time, it became equal, later even dominant on the world computer market.

two Drive types
Hard Drives

Note: SSD technology was known many years back. Unfortunately, the production process was too expensive for widespread use. On the other hand, HDD was affordable and in that period much more convenient solution as a storage device.

HDD design

HDD has designed a long time ago (1956), and it uses rotating platters, with the data on the platter surface. A spindle that moves near the surface reads data from circular disks (platters).

Although the high speed of the platters (5,400 or 7,200 RPM modern Hard Drives), movements are causing HDD to read/write limitations. SSD has a completely different design, so let’s see how SSD works. Before we go on reading the next chapter, we need to know that a classic HDD has an actuator coil, which is also a moving part.

SSD design

Unlike HDD, the SSD doesn’t have any moving parts inside and it is completely free of spinning, or any kind of linear movement inside its case. Basically, the SSD is a chip and there is its power and speed. The easiest way to understand SSD is to compare it to a USB drive stick. The big difference is that SSD uses a much higher speed to operate and it connects to the motherboard through the interface and so it can run all major operating systems.

Difference between HDD and SSD

These two technologies are completely different but still, the device accomplishes exactly the same tasks. To be precise, SSD does it in an effortless way comparing it with an HDD.

HDD vs SSD speed difference

HDD has moving parts, and it reads data by using basic electromagnetic principles. This means that the spindle needs to position over the rotating platters to retrieve bits and recreate bytes, following the whole chain to complete the requested data. To complete a simple task, all these moving parts working continuously with precise synchronization and really great speed. Still, that speed is “slow-motion” compared to electric pulse and a chip with a stored data inside SSD. To read/write data, an SSD needs a controller and small electric contacts with a NAND flash memory chip.

HDD vs SSD power consumption

The whole story goes around these moving parts inside a classic HDD. If you think about HDDs design, and if you know that electro-motor, actuator, and other electronics are all electric consumers, it is easy to understand so much need for power. On the other end, SSD has an electronic board with a few electronic chips (controller & NAND chip), which is why SSD doesn’t need so much power.

HDD vs SSD noise level

Electro-motor creates noise, and an actuator creates noise. The electronic circuit works silently, just like electronic chips. Enough said.

HDD vs SSD heating elements

Heat can be present in both of these drives. Still, HDD generates more heat, and we all know that heat can slowly damage electronics over time.

HDD vs SSD magnetism

HDD reads & writes data by using basic electromagnetic principles. If you have an IQ>70, I think that there is no point in explaining what would happen if we place a magnet near the HDD. SSD isn’t affected by magnetism.