SSD and HDD hard drive: what’s the difference

SSD and HDD hard drive
SSD and HDD hard drive: what's the difference
  1. HDD and SSD: the main differences
  2. Cost
  3. Capacity
  4. Speed
  5. Shape and level of noise
  6. Fragmentation and defragmentation of disks
  7. Reliability and service life
  8. Results

In 2009, a new type of Solid State Drive (along with the HDD) appeared on the computer equipment market. This novelty has actualized the problem of choice: SDD and HDD: what’s the difference? What’s best for the user? What nuances should be considered when choosing, and what can be overlooked? More details – SSD and HDD hard drive in our review.

SSD and HDD hard drive: the main differences

The main purpose of SSD and HDD hard drive to securely store users’ personal data. However, they implement their function in different ways. There are several differences – first of all, this is the principle of operation.


In the HDD version, the recording and reading of information is carried out thanks to a special head moving above the disk surface, which rotates rapidly. In the second, there are no movable elements, and the “filling” looks like a set of microcircuits on one board.

The cost

The first thing that users pay attention to when thinking about disks is the price. In this regard, the undoubted advantage of HDD. Typically, a standard 1TB drive will cost you at least $ 50. While the cost of an SSD will be about four times as much – about $ 200. But technologies are developing rapidly, and every year the difference in pricing for the two types of drives is decreasing.


In the early 2000s, the difference between the maximum capacities of the two different types of drives was huge. In fact, the SSD could not compete at that time. However, already now the maximum figures are 4 TB. While the amount of HDD-memory now reaches 50 TB.


Very often, it is speed that is the indicator that users most often pay attention to. In this regard, the SSD hard drive is the leader. The speed of this drive is several times higher than that of HDD.

Just a few seconds to download, launch the most complex games and applications, copy colossal amounts of information data. And you can’t argue with that, since the acceleration of the system when using SDD for the operating system is very strongly felt in practice.

Disk fragmentation and defragmentation

Large files are ideal for an HDD, while bulky materials – photos, books and audio recordings – in combination with constant copying and deleting inevitably lead to slow hard disk performance. Why is this happening?

The components of the file are scattered over its surface, so the read head has to search for fragments in different sectors, wasting time. This phenomenon is called fragmentation. In order to “put things in order” and bring all parts of the files into a single chain, you need to periodically defragment. This is the only way to maintain the speed of work at a good level. SSDs do not need such operations due to a radically different principle of operation.

Reliability and service life

SSDs, unlike their competitors, have special moving parts. Therefore, you can use a laptop in transport, despite the vibrations, and not worry about disruption to the permanence of work and loss of data. The situation with HDD is completely different. Here, the read head is in close proximity to the magnetized blanks. Therefore, even a slight vibration leads to the appearance of the so-called broken sectors. However, the design of an SSD, despite its clear advantages, has the disadvantage of a limited cycle of use. Continuous deletion, copying, and writing of gigabytes of data will reduce the solid-state drive’s life.

Shape and noise level

In the modern world, everything is important. And of course, a more compact drive is a more promising popular one. The SSD is the winner in this regard. The special design of the HDD does not allow it to be reduced to a miniature size.

Shape and noise level

Rotation of HDD disks inevitably leads to the appearance of noise – a characteristic crackling. While the processes inside SSD drives are completely silent.


It is impossible to name the main winner of the battle between HDD and SSD. Each of the drives has its own advantages and disadvantages. For example, HDDs are slow and noisy, with them there is a possibility of mechanical breakdowns, therefore they require very careful handling – no mechanical impact, but they are inexpensive and capacious. At the same time, SSDs have a limited service life and stand out for their expensive cost, but at the same time, they are silent, fast, and do not need defragmentation.

That is why, to answer the question of what exactly you need to buy, first think about the purpose for which you are purchasing the drive. If you need to save large amounts of information, and the computer will be used for social. Networks and multimedia entertainment, then your choice is HDD. But if you never sit still, constantly travel, the system boot speed is important to you, you hate noise and often deal with photo and video processing in various programs – feel free to choose an SSD. You will not go wrong.

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