The difference between hard disk solid state and mechanical, the difference between mechanical hard

The information age is the era in which information generates value, and its representative symbol is"Computers"It is mainly based on information technology, focusing on the creation and development of knowledge, and behind the computer, there is an organic combination of a series of precision instruments and wisdom, of which the hard disk is the most important storage device of the computer.

Nowadays, there are many computers that do not need to replace the computer after becoming stuck, because it may be because there is too much software in your computer, of course, it may also be the reason why your computer hardware configuration is too low, at this time you only need to replace one of the hardware, or add upgrades, so that it costs hundreds of dollars to solve the problem of computer lag. For example, adding an SSD will make your computer run at a rapid pace, so what is the difference between an SSD and a traditional HDD?

The simple difference is that hard disk drives (HDDs) are low cost and have a long lifespan, while solid state drives (SSDs) are quieter and more efficient. A brief introduction:

HDDs have a mechanical structure that allows the head to rotate on a rotating platter to find the sector where the file is located when reading and writing, similar to the previous ***** discs. When running, the motor runs at high speed, generating vibration and perceptible noise, and if it is used in motion or vibration, it is easy to damage the hard disk, and the temperature range that can be withstood during operation is small. However, HDDs have a long lifespan because they can be read more times, and they are also easy to do with large capacity.

Solid state drives are mostly composed of master cache and flash memory, because there is no mechanical structure, no seek is required when reading and writing, so it is extremely fast, efficient, noiseless and shock-resistant, has a low-power standby function, and can withstand a larger temperature range than mechanical hard disks when working. However, SSDs have a relatively short lifespan due to the limited number of reads and writes, and the unit cost is higher.

1. Shockproof and drop-resistant: mechanical hard disk has poor shockproof and drop resistance, and there are many components of mechanical hard disk, and when vibration occurs, its parts are easy to loosen, which is easy to cause the loss of Chinese parts of the hard disk. Because of its one-piece structure, SSDs are tightly packed on the outside and are highly resistant to drops.

2. Data reading speed: Testing two hard disks in the same computer, the reading speed of the solid-state disk is much greater than that of the mechanical hard disk, and the performance can be increased by as much as two times.

3. Power consumption: Due to its special structure and composition, the power consumption of solid-state hard disk is much lower than that of mechanical hard disk.

4. Noise: Because the solid state drive has no mechanical parts, it has the characteristics of low heat generation, fast heat dissipation, etc., and there is no mechanical motor and fan, so it will not produce any noise, while the mechanical hard disk is noisy.

Mechanical hard disks: The structure of mechanical hard disks is relatively complex. Under the heavy body, there are hidden motors, magnetic heads, turntables, transmission shafts and other devices, and the assembly environment of mechanical hard disks is harsh, and it must be carried out in a closed dust-free workshop.

Its working principle is to read and write information to a high-speed rotating platter through a magnetic head.

Solid-state drives: Solid-state drives are small in size and light in weight. The interface of the solid state drive, similar in appearance and memory module, is simple in structure, and an integrated circuit board is all of it.

1. The essence is different: the essence of mechanical hard disk is electromagnetic storage, and the advantage is that the unit cost is low; Whereas, SSDs are semiconductor storage, which has the advantage of being fast. 2. The shock resistance and drop resistance are different

Mechanical hard drives have weak shock resistance and drop resistance, while SSDs have good shock resistance and are lighter in weight than mechanical hard drives. 3. Different power consumption: The power consumption of SSDs is lower than that of HDDs, and the read speed is much faster than HDDs.

The difference between an HDD and an SSD

A computer's hard disk is the most important storage device for a computer. A hard disk, or HDD for short, consists of one or more discs made of aluminum or glass that are covered with a ferromagnetic material. The vast majority of hard drives are fixed hard drives that are permanently sealed and fixed in the hard drive.

Early hard disk storage media were replaceable, but today's typical hard disk is a fixed storage medium that is encapsulated in a hard drive.

When the hard drive is working, never force the power off. Turning off the power while the hard drive is working can lead to physical damage to the hard drive and data loss. In addition, if there are parts running at high speed in the hard disk, if the high-speed disc stops suddenly if it is forcibly shut down, and if it is turned on immediately after shutting down, it is more likely to cause damage to the hard disk.

In addition, from the perspective of the service life of the two types of hard drives, mechanical hard drives have a longer lifespan, and solid state drives do not last as long as mechanical hard drives. In addition, SSDs have a limited number of reads.

The mechanical hard disk is mainly composed of: platter, head, platter shaft and control motor, head controller, data converter, interface, cache and other parts.

Solid state disk or solid state drive, also known as electronic disk or solid state disk, is a hard disk composed of a control unit and a solid-state storage unit (DRAM or flash chip). The interface specifications and definitions, functions and usage methods of SSDs are the same as those of HDDs, and the product shape and size are also the same as HDDs.

1. Performance.

The construction of SSDs and HDDs is completely different. The SSD starts up and is fast to rent, and there is no motor to accelerate the rotation process.

2. The basic principles of reading and writing are different.

3. The read and write speed is different.

4. Data security.

5. The number of writes.

6. Data recovery.

Solid-state drives are more suitable for system disks. SSDs are noiseless when in use, and there are no mechanical parts inside. Flash memory particles are used, so there is little chance of data loss due to collisions and vibrations.

And the read speed of the SSD can reach 3500MB s, and the power consumption and heat generation are lower than that of the HDD. Then the disadvantage is that once the data is lost, the difficulty of recovering it is greater than that of the mechanical hard disk, and it is slightly more expensive than the mechanical hard disk.

SSDs are identical to ordinary HDDs in terms of interface specifications and definitions, functions and usage methods, and are basically the same as HDDs in terms of product shape and size (the size and shape of SSDs in the emerging form are completely different from SATA HDDs).

Because the technology of solid-state drives is different from that of traditional hard disks, many new memory manufacturers have emerged. Manufacturers only need to buy NAND chips, then configure the appropriate control chip, write the main controller**, and make the SSD.

SSDs have a similar lifespan as HDDs, about ten years.

SSDs are a lot faster than HDDs.

SSDs are much better than HDDs in terms of shock resistance. In actual use, HDDs are actually more likely to break. The most feared thing about mechanical hard disks is to suffer vibrations on the way to work, or to move the computer when in use, which will lead to the instant scrapping of mechanical hard disks, don't think this is alarmist, although the quality of hard disks has improved now, but this kind of thing is not impossible.

The same 1TB solid-state drive (SSD) and mechanical hard disk (HDD), SSD is between 400-500 yuan, and HDD is between 300-400 yuan. ** is a major factor in determining the prevalence rate.

SSD corruption data is almost unrecoverable, which is not the case with HDDs. i.e. poor security. This may not be important for families, but it can be fatal for businesses.

It is recommended that SSDs and HDDs be used together, with SSDs used as system disks and HDDs used as storage disks.