What is hard disk?

What Does hard disk Mean

A hard drive (also known as a hard drive in some countries) is a device used in computers and other gadgets to store digital information . Regarding their composition, they have discs that are linked by a common axis and that rotate inside a metallic structure, with writing and reading heads on each disc .

Since the creation of the first hard drive in 1956 , these devices have managed to increase their storage capacity while falling in price. The flow of information circulating these days forces computer users to have large capacity hard drives to hold all kinds of data, from text documents to high definition movies, including music and photographs.

Hard drives communicate with other components through a standardized interface such as IDE (also known as ATA ), Serial ATA , FC, or SCSI . The choice of this interface depends on the type of computer (whether it is a workstation, a server , etc.).
The logical structure of the hard disk includes distinct sectors. The boot sector or Master Boot Record houses the partition table, while these partitions contain the file systems.
When choosing a hard drive for a computer , consider the average read and write time (what it takes to write or read data), the average search time, the average access time and the transfer rate ( how long it takes to transfer data to the computer), among other factors.
Major hard drive manufacturers include Seagate , Western Digital , Quantum , Hitachi , Toshiba, and Samsung .
Differences with SSDs
For several years now, hard drives have seen the birth of their biggest (and perhaps only) opponent: SSDs, an acronym for Solid State Drive . Without going into technicalities, it is a very different technology from the former, but not necessarily revolutionary in itself, since it does not differ substantially from flash memories or RAM modules. Hardware connoisseurs anticipated their creation long before they were released, knowing that the only obstacle to their manufacture would be price.
Even today, when solid state drives are relatively popular, no one has managed to bring a product to the market that can compete with hard drives in capacity and price . They rely, on the other hand, on their incredible reading and writing speed , which exceeds that of their old competitors a minimum of three times (they are at least 300% faster).

Among other advantages, we find energy saving ; The reason is that they do not have moving components, so they use much less electricity to function. This has a direct effect on the heat they produce, which is also much lower, making mobile devices such as notebooks and tablet PCs more comfortable to use when in contact with the body. As if these two characteristics were not enough strengths, their compactness makes them much more resistant to shocks and falls; Put in numbers, they are an average of five times stronger.
At first glance, a mid-range PC installed with an SSD can transform dramatically, significantly reducing operating system and program load times , and offering an overall smoother and more enjoyable experience for the user. However, given the large price difference, favorable for hard drives, most people refuse to make the leap, valuing not only the economic aspect but the greater capacity they get with traditional technology.

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