What is a hard disk drive and how does it work?

Hard disk drives are often connected to computers for storage, although they came out later than the first computers. With the rapid advancement of technology, today's hard drives are getting smaller and smaller in line with popular standards with increasing capacities.

What is a hard disk drive and how does it work?

Hard drives not only follow the original design, but also feature technological advancements that make storing and retrieving data faster: for example, the introduction of hybrid hard drives makes operating systems better. Additional optimizations, faster system boot times, energy savings, and changes to the method of writing data to magnetic disks significantly increase the capacity of each hard drive.

Summary of article content:

  1. Computer hard drive
  2. Is it important?
  3. Components of a hard drive
  4. What is hard drive capacity?
  5. The development history of the hard drive
  6. How many types of hard disk drives are there today?

Computer hard drive">Computer hard drive

Its working principle, depending on the type, can be a circular drive made of aluminum or a chip. In the middle of the drive there is a rotating motor to read / write data, combined with these devices - the electronic board controls the read / write head to return to the correct position of the previous magnetic disk when spinning to decode the information. So your operations such as storing movies, music, software, information, games from your computer to another device such as USB but faster also depend on this part, the later the material of the components in the computer. that hard drive, the more secure the data you store on it

Is it important?

Hard drive is an essential component of a computer, all user data such as Windows operating system or personal data is stored on the hard drive and is always available for regular operation.

The hard drive is involved in important issues when using a computer, such as the speed of the computer booting, the speed of copying and exporting data, and the security of personal data stored on the computer. count. Therefore, when buying a laptop, you should pay attention to the computer's hard drive.

Components of a hard drive

Hard disk drive SSD

A magnetic disk: is a circular metal disk mounted inside a hard drive. Some disks are mounted on a spindle motor to create multiple data storage surfaces in a smaller space.

To maintain organized data storage and retrieval, magnetic disks are arranged into specific structures. These specific structures include tracks (tracks), sectors, and clusters.

  • Track: Each magnetic disk is divided into thousands of tightly packed concentric circles, called tracks. All information stored on the hard drive is recorded on the track.
  • Sector: Each track is broken down into smaller units called sectors. Sector is the basic unit of data storage on the hard drive.
  • Cluster: Sectors are often grouped together to form clusters.
    Read/write head

Read/write head: The reader is the part between the magnetic media where the data is stored and the electronic components in the hard disk. The reader converts bit information into magnetic pulses when stored on the magnetic disk and reverses the process during reading.

Spindle motor: The spindle motor plays an important role in the operation of the hard drive by spinning the hard disk. A spindle motor must provide stable, reliable and consistent rotational power for many hours of continuous use.

Data processing circuit: The hard disk is made of a smart circuit board integrated into the hard disk unit. It is mounted on the bottom of the hard drive. The read and write heads are linked to the data processing board via a flexible ribbon cable.

Hard drive slot: The entire hard disk is mounted in a sealed enclosure designed to protect it from outside air. Below the drive is called the base. The drive mechanisms are located in the base and cover, which are placed on top to ensure the tightness of the reader and magnetic disc.

What is hard drive capacity?

Hard drive capacity is the storage space, the space on the drive can store data for the operation of the computer. Depending on the storage space of each different type of drive, the drive capacity can range from a few hundred MB to several GB or several TB.

The development history of the hard drive

The development history of the hard disk drive
The first hard disk drive was the IBM 350 RAMAC hard drive born in 1956 with an electric rotary motor system that weighed a ton and could only store up to 3.75MB. In 1976 inventors replaced the magnetic platters with magnetic ferrite memory that offered faster speeds and better response times.
In 1980, the first floppy disk drive was born, with a size of 5.25 inches, a very simple structure, weighing about 3.2 kg. The hard drive could be installed neatly and provided a high and stable data transfer rate, creating a technology craze at that time.

In 1988, to meet the needs of businesses, a 2.4-inch hard drive was born with a capacity of 20MB and short read and write speeds of only 23MB/s. In 1995, hard drives using NAND Flash memory were born, providing extremely fast, extremely stable connection speeds.

In the 21st century, hard disk drives were born with many different capacities, the size has been reduced to a minimum. Today, the world has popularized hard drives with a very small size of only 2.5 inches, weighing less than 100g, but delivering extremely fast speeds with read and write speeds that can reach more than 540Mb/s.

How many types of hard disk drives are there today?

HDD vs SSD which is better?

Currently, there are 3 types of hard drives including:

  • HDD: the first hard drive used
  • SSD: this hard drive is new, has a faster data transfer rate than HDD
  • Hybrid HD: this hard drive is a hybrid of HDD and SSD

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