Solid-state hard disk has great advantages in transmission speed, up to 500M/s, in which the reading speed is 400-600M/s and the writing speed is 200M/s. For the file of 1G, it only takes a few seconds, but the reading speed limit of traditional IDE hard disk cannot exceed 200 m/s and the writing speed cannot exceed1000 m.

2. Data security

We all know that the traditional hard disk reads and writes data through the magnetic head, especially in the process of high-speed rotation, the collision between the disk and the magnetic head is more likely to cause data damage, while the solid-state hard disk has no disk, so as long as its chip is not deformed by the shape, it can safely store data, so there is a great difference between the solid-state hard disk and the ordinary hard disk in data security.

3. Economic price

Solid-state disk changer has great advantages in speed and security, because it is the latest technology, so the price is much higher than that of traditional hard disk. The current price of SSD is generally 2-3 times that of traditional HDD. However, with the continuous development of Moore's Law, the density of NAND flash memory chip of solid-state hard disk will be larger and larger, the storage capacity will be higher and higher, and the price will be lower and lower. It can be predicted that it is imperative for solid-state hard disk to replace traditional hard disk.

4. Seismic capacity

Because the mechanical hard disk is based on the principle that the high-speed rotating disk and magnetic head seek to read and write data back and forth, there can be no high-intensity vibration, otherwise the contact between the magnetic head and the high-speed rotating disk will cause scratches and damage to the disk, leading to the scrapping of the mechanical hard disk. Therefore, it is necessary to avoid vibration when using mechanical hard disk, while solid-state hard disk adopts solid-state electronic memory chip array and is welded on the circuit board, which is thinner than mechanical hard disk and has better shock resistance.

5. Power consumption and noise

The high-speed rotating disk of mechanical hard disk needs high-power stepping motor to drive, while solid-state hard disk does not need motor to drive, so the power consumption of mechanical hard disk is much higher, and there will be slight vibration and noise when working because of the rotation of motor, but solid-state hard disk does not have these problems.

6.SSD is more difficult to recover data than traditional hard disk.

If the SSD hard disk is broken, data recovery is much more difficult than the traditional hard disk, so please pay more attention to this one. Don't be blinded by all kinds of advanced SSD hard drives.

The physical composition of SSD solid state hard disk is basically flash memory+main control+cache +PCB+ interface. Without mechanical parts, data reading and writing are all electronic signals, and without bottlenecks such as motor speed, the performance will naturally come up. Through the above description of the difference between solid-state hard disk and ordinary hard disk, we can draw the following points:

1. Volume and weight: SSD wins completely.

2. Noise and vibration: SSD wins again and is absolutely silent, while the noise of HDD can be high or low, and some are enough to make people crazy. Vibration is also a problem to be considered.

3. Temperature: The highest temperature of HDD is about 40 to 50 degrees, and SSD is lower, but this problem has little effect.

4. Power consumption: The maximum power consumption of HDD is about 5- 10W, and that of SSD is usually less than 3W. Similarly, the impact of this problem is not too great, and enterprise users will have to calculate it separately.

5. Capacity: HDD wins. At present, there is 1TB for civil SSD, but it is very expensive. Now it costs more than 2000 RMB, and the maximum HDD is 4 TB.

6. Price: HDD wins, and the greater the capacity, the more obvious the advantages of HDD.

How to choose

Large-capacity users: With the advent of the era of big data, data will show explosive growth, and both enterprises and individuals need more storage capacity. The advantage of HDD in capacity is very obvious, so choosing HDD is undoubtedly the best choice.

Speed requirements: If you have special requirements for storage speed, then you choose SSD.

Multimedia users: Multimedia storage needs to occupy a lot of storage space.

Game users: Game users often need faster response speed, so if you are a loyal fan of the game, then choose SSD.

Frequent business travelers: These people often need to carry notebooks and other business trips, and often encounter various unexpected situations. SSD hard disk can have a good shock-proof effect, which can protect enterprise data security.

Buyers who pursue cost performance: If money is the primary factor for users to consider, then HDD is the first choice. Due to the mature technology, its cost performance is high.

Print users: The editing of videos and photos needs to be stored repeatedly, which requires a great life of the hard disk.

General users: If you have no special requirements for the speed of the hard disk, there is no special requirement for the stability and shock resistance of the hard disk. Then you don't have to choose an expensive SSD.

Mechanical hard disk (HDD) is still the mainstream storage device at present, while solid state hard disk (SSD) has a very broad market prospect. In 20 13, some organizations even predicted that the SSD market would double, and it could even account for 40% of the market by 20 16. Indeed, with the continuous improvement of SSD technology, problems such as price, capacity and life span will be gradually solved, and SSD has a good market prospect.

At present, the single use of mechanical hard disk (HDD) or solid state hard disk (SSD) can not meet the needs of users, and people have been pursuing storage methods that can meet the performance requirements and have high cost performance. Hybrid storage hard disk is a new concept put forward in recent years, which combines the advantages of mechanical hard disk and NAND flash memory, hoping to solve the problem of user demand.

Although Seagate and other manufacturers have introduced products similar to hybrid hard disks, their popularity in the market is not ideal, because they can't really combine the advantages of the two. In the field of notebooks and servers, another kind of hardware-based hybrid storage is quietly emerging. Although it is not a real hybrid storage, this storage method, which uses SSD as storage cache, provides high storage efficiency and uses HDD to increase storage capacity, has been well received by many users.