Storage drive has been one of the essential components in a PC. In the old days HDD otherwise known as Hard-Disk Drive is the traditional storage drive that we still use until now. However with the introduction of SSD a.k.a Solid State Drive
Speed: In order to measure the speed of SSD and HDD, it must be referred to how fast they can read and write data. For HDD, the speed at which the platters spin helps determine the read/write times. As long the file being read was written sequentially, the HDD will read it quickly. However, as the disc becomes crowded with data, its east for a file to be written across multiple sections. This known as “fragmenting” and leads to files taking longer to read.
The read and write speed of SSD vs HDD
The case is different with SSD because files can be written sporadically across the cells and in fact are designed to do so, with little impact on read/times as each cell is accessed simultaneously. This easy and simultaneous access to each cell means files are read at incredibly fast speeds, faster than HDD can achieve, regardless of fragmentation.
Durability: SSD are considered far more durable than HDD due to lack of mechanical parts. The moving mechanisms within an HDD are susceptible to not only wear and tear over time but also damage due to movement or forceful contact. For example, if a laptop drop to a floor with a HDD, there is a high likelihood that all those moving parts will collide, resulting in potential data loss and even physical damage that could kill the HDD outright. SSD has no moving parts, so they can last longer and possible to survive the rigors we impose upon portable devices and laptops.
The internal parts of HDD and SSD
Form factor: HDD mostly comes in 3.5 inch or 2.5 inch disk, while SSD are spreading out into a variety of shapes and sizes. The most common size is still the 2.5 inch drive with a slim plastic board with two plugs on one side. Newer desktops are fitted with a place to mount these specific drives but they can also be mounted into the 3.5 inch brackets with an adapter.
Alternatively, there are also smaller SSD built on form factors such as M.2 and NVME and its becoming more common. However, they are more expensive than the SATA III counterparts but are much smaller and increasingly offer the fastest storage speeds available.
Types of SSD with multiple forms and sizes
Samsung 960 EVO M.2 NVME SSD
Pricing: When SSD were introduced to the consumer market, they were expensive and higher-end devices have less storage than HDD. For the same amounts of storage, users could end up paying nearly double the amount for an SSD than an HDD, even at higher capacities.
With the advancement and fast pace of technology, SSD price has been declining and becoming more affordable to purchase. If building a desktop with speed, power needs or portability, then SSD is a better choice as it is faster, more efficient and far more durable data storage overall.
SSD price has been falling over the years and experts predicts it will continue to fall in 2019 and beyond
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Article Source: https://www.digitaltrends.com/computing/what-is-an-ssd/
