Why is my USB drive so slow?

First of all, as far as the chip problem is concerned, there are three kinds of SLC, MLC and TLC present on the market. SLC chip USB flash drive has an obvious advantage in speed, which fully demonstrates the strong performance of SLC's chip. SLC chip has a strong advantage in loading speed and data transmission speed, and SLC is lower than MLC in energy consumption. In addition, the SLC chip can guarantee 100,000 times of stable access, so it has a longer service life.

Flash chip

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 Cheng to increase the capacity of the product without additional investment in production equipment, cost and yield advantages. Compared with SLC, MLC production cost is lower and capacity is large.

Comparison of SLC and MLC parameters

TLC chip Technology is an extension of MLC and TLC technology, after the formal advent of TLC, 1 storage units can store 3 bits, the cost of further reduction. In the way of TLC's successful promotion, the Flash manufacturer, Toshiba and Samsung, have made a significant contribution, making the whole TLC technology mass produced and applied to end products. TLC chips, although the storage capacity of large, low-cost many, but because the performance also greatly reduced, it can only be used in low order NAND flash related products, such as Low speed flash memory card, small memory card microSD or portable disc.

SLC, MLC, TLC contrast

From the above introduction, we see the advantages and disadvantages of SLC, MLC and TLC technology, can also draw a conclusion: MLC is the future trend of NAND flash, like CPU single core, dual core, four core, like MLC technology uses more bits per cell to achieve capacity multiplication, until more advanced architectures come out. SLC's cost cannot be hurt, and TLC is more likely to cause data security risks, so choosing a MLC USB drive is more reliable.

First of all, as far as the chip problem is concerned, there are three kinds of SLC, MLC and TLC present on the market. SLC chip USB flash drive has an obvious advantage in speed, which fully demonstrates the strong performance of SLC's chip. SLC chip has a strong advantage in loading speed and data transmission speed, and SLC is lower than MLC in energy consumption. In addition, because SLC chip can guarantee 100,000 times stable access, so it has ...

After talking about the problem of the chip, let's talk about the principle of the main control. On the current market on the USB drive product control There are many kinds of, the most common is Bancan, group, Chi-Tai, Hui Rong, Sheng, Xin Chong, an Guo and the core State master control. Each main control has its own advantages and disadvantages. Many netizens have a great interest in the volume production of USB drives, and each master-controlled mass production tool is also different. This knowledge is too deep, the author is not clear (sorry), so I do not say in detail.

Bancan in 2012 to actively layout the brand system factory market and the mainland market, while the new generation of Flash control chip IS903 (dual channel chip), support the latest process of 21NM/20NM/19NM MLC NAND Flash, and Is916en (single channel chip Support the latest process of 21NM/19NM TLC-type NAND Flash, so that customers can use the dual-channel chip (IS903) to develop high speed products, as well as a single channel chip (IS916EN) to develop low order products, to plan the complete product line. Now a lot of speed USB3.0 USB drive selection Bancan as the main controller.

Wei just S107 selection of silver-en main control

Group-linked master control

Toshiba MX High Speed USB flash drive with Xin Chong main control

In all main controls, the group Phison is also widely used. It is the best compatibility, the highest rate of production success (99%), and read and write speed is almost the fastest, group-controlled mass production tools are the most and most comprehensive. Chi Tai Skymedi and Xin Chuang is also widely used in the selection.

Write in the end: Flash disk chip and the main control determines its speed and stability. Of course, also with the brand of the production process has a relationship. Some people may say that these two decisive factors need to pass the tool test to know, in case of buying a bad product returned or after the sale is a problem. Therefore, the author thinks: if the manufacturer will choose the flash particles and the main control on the packaging to explain the words, will let consumers more secure to buy such products.