What are the two major factors related to u disk transmission speed?

In the process of using the u disk, we will inevitably encounter some problems. For example, sometimes the u disk transmission speed is very slow. What is going on? In fact, this is caused by the control chip and the flash chip. For this problem, the following small series introduces the two factors that affect the transmission speed of the u disk.

a factor: Flash chip speed difference is big

First, chip issues, the current existence of SLC, MLC and TLC three kinds on the market. The SLC chip USB flash drive has obvious advantages in speed, which fully demonstrates the powerful performance of the SLC chip. The SLC chip has a strong advantage in terms of loading speed and data transmission speed, and the SLC is also lower than the MLC in terms of power consumption. In addition, since the SLC chip can guarantee stable access of about 100,000 times, it has a longer life.

The MLC architecture can store more than 4 values ​​at a time, so the MLC architecture has a high storage density and can use the old production process to increase the capacity of the product without additional investment in production equipment, cost and yield. The advantages. Compared with SLC, MLC has lower production cost and large capacity.

SLC and MLC parameters comparison

TLC chip technology is an extension of MLC and TLC technology. After the TLC architecture is officially released, a memory storage unit can store 3 bits, and the cost is further reduced. On the road of successful TLC promotion, the flash memory manufacturers Toshiba and Samsung have made great contributions, making the entire TLC technology mass-produced and applied to the terminal products. Although the TLC chip has a large storage capacity and a low cost, it can only be used in low-end NAND Flash related products, such as a low-speed flash memory card, a small memory card microSD or a flash drive, because the performance is greatly reduced.

SLC, MLC, TLC comparison

From the above introduction, we can see where the advantages and disadvantages of SLC, MLC and TLC technology are, and we can also draw a conclusion: MLC It is the development trend of NAND Flash in the future. Just like CPU single core, dual core and quad core, MLC technology realizes multiplication of capacity by storing more bits per Cell until a more advanced architecture is available. The cost of SLC can't be hurt, and TLC is more likely to cause data security risks, so the choice of MLC's USB flash drive is more reliable.

Factor 2: The influence of the main control of the u disk is very important

In addition, the main controls used on the u disk in the market are as follows: Qingtai, Qunlian, Huirong , Liansheng, Xinchuang, Anguo and core state master control. Each type of master is used on different brands of USB flash drives, and its characteristics are different, which is why there are differences between different brands of products. The main control is different, but they have not fully realized the advantages of USB3.0. We are looking forward to the continuous optimization and development of the U disk master, making USB3.0 play a really fast role.

The above is the two major factors that affect the transmission speed of u disk introduced by everyone. If you don't know the user, let's take a look at it and hope to help everyone.