Why is my USB flash drive so slow?

First of all, as far as the chip problem is concerned, there are three kinds of chips on the market: SLC, MLC and TLC. SLC USB flash drive has obvious advantages in speed, which fully shows the powerful performance of SLC chip. SLC chip has strong advantages in loading speed and data transmission speed, and SLC is lower in energy consumption than MLC. In addition, the service life of SLC chip is longer, because it can guarantee the stable access of about100000 times.

Flash memory chip

MLC architecture can store more than four values at a time, so the storage density of MLC architecture is high, and the old production technology can be used to improve the product productivity, without additional investment in production equipment, which has the advantages of cost and yield. Compared with SLC, MLC has lower production cost and greater capacity.

Comparison of SLC and MLC parameters

TLC chip technology is an extension of MLC and TLC technology. After the formal appearance of TLC architecture, 1 memory storage unit can store 3 bits, and the cost is further greatly reduced. On the road to the successful promotion of TLC, flash memory manufacturers Toshiba and Samsung contributed greatly, making the whole TLC technology mass-produced and applied to end products. Although the storage capacity of TLC chip becomes larger and the cost is much lower, it can only be used in low-level NAND Flash related products, such as low-speed flash cards, small memory cards such as microSD or USB flash drives.

Comparison of SLC, TLC and TLC

From the above introduction, we can see the advantages and disadvantages of SLC, MLC and TLC technology, and we can also draw a conclusion that MLC is the development trend of NAND Flash in the future. Just like CPU with single core, dual core and quad core, MLC technology can double the capacity by storing more bits in each unit until a more advanced architecture comes out. SLC can't afford the cost, and TLC is more likely to cause data security risks, so it is more reliable to choose MLC flash drives.

First of all, as far as the chip problem is concerned, there are three kinds of chips on the market: SLC, MLC and TLC. SLC USB flash drive has obvious advantages in speed, which fully shows the powerful performance of SLC chip. SLC chip has strong advantages in loading speed and data transmission speed, and SLC is lower in energy consumption than MLC. In addition, because SLC chip can guarantee the stable access of100000 times, it has the following characteristics. ...

After talking about the chip, let's talk about the principle of master control. At present, there are many kinds of USB flash drives on the market, the most common ones are Yincan, Qunlian, Qingtai, Rong Hui, Liansheng, Xinchuang, Anguo and Xinbang. Every master has his own advantages and disadvantages. Many netizens are interested in mass production of USB flash drives, and each master's mass production tools are different. This topic is too profound, and I don't understand it at present (sorry), so I won't go into details.

In 20 12, yincan actively laid out the brand system factory market and the mainland market. At the same time, a new generation of control chip IS903 (dual-channel chip) is introduced for the new technology Flash, which supports the latest technology of 21nm/20nm/19nm MLC NAND flash. And IS9 16EN (single channel chip) supports the latest technology of 21nm/19 nm TLC NAND flash. Customers can use the dual channel chip (IS903) provided by Yincan to develop high-end and high-speed products, and the single channel chip (IS9 16EN) to develop low-end products to plan a complete project. At present, many ultra-high-speed USB3.0 flash drives choose Yincan as the main controller.

Weigang S 107 chose Yincan as the main controller.

Group master control

Toshiba MX high-speed USB flash drive adopts new master control.

In all major controls, group association associated with groups is also widely used. Its compatibility is the best, the success rate of mass production is the highest (99%), the reading and writing speed is almost the fastest, and the mass production tools controlled by the group alliance are also the most comprehensive. Qingtai Skymedi and Xinchuang are also widely used choices.

Written at the end: the flash memory chip and main control of U disk determine its speed and stability. Of course, it is also related to the production process of the brand. Some people may say that these two decisive factors need to be tested by tools. In case of purchase, it is a problem to return or sell defective products. Therefore, the author believes that if manufacturers write the selected flash particles and master control on the packaging, consumers will be more assured to buy such products.