Flash white and black chips in the USB flash disk

In short, the black chip concept is mainly used for chips, while the white chip concept is used for both chips and flash cards. Black chips are the defective products selected by the chip factory. They are not labeled by the manufacturer or the chip model.Such chips have been circulated to the market through a variety of channels. Now many U disk manufacturers have purchased a large number of bad chips from the chip factory, which are processed by technology and made into products, to reduce their costs! The white slice is a little better than the black slice, and the white slice is marked with various labels manually! But it is not a real factory logo!At the same time, the white chip can also refer to the white card, that is, there is nothing on the surface of the flash card. The Flash industry generally involves black, white, and neutral cards. The so-called Black chip, mainly refers to the flash chip with no record on the surface, Such as K9K8G08U0A-PCB0 SLC chip, without this model, is black. The white chip mainly refers to the fact that there is no flash card on the surface, and no flash card is displayed.. A neutral card is a flash card with the words "Micro SD" and "SD" on the surface, but it is not labeled with a designated brand logo.. Downgrade FLASH: 1 in a USB flash disk. The flash granules use a whiteboard chip, that is Some unqualified flash memory particles in the factory enter the market through informal channels and use the particles after polishing the serial numbers. It is generally difficult to find the source of the serial numbers above.The usage of a USB flash drive with such particles is extremely unstable. Copying data on the same computer may not cause problems, but it may fail to be opened on another computer. 2. "Upgrade" the USB flash disk. The so-called "Upgrade" does not replace a faster control chip or larger flash memory size, but uses special software to modify the USB flash disk information, the USB interface can be changed to USB2.0, And the MB capacity can also be changed to 1 GB. However, these are only information displayed on the surface, but in fact their performance and capacity will not change. 3. black chips are used. When some flash memory particles are damaged, only part of the capacity can be used. The profiteers will launch the idea that they should destroy the particles. Shielding the damaged area or welding several damaged particles to reach a certain capacityThe USB flash drive using this black chip not only slows down the transmission speed, but also has a high probability of problems. 4. Change with hardware. Hardware uses a circuit to artificially identify a large-capacity USB flash disk to a computer, because the USB flash disk must use a storage chip, which is usually referred to as flash memory, flash Memory has a few feet that are used to detect the capacity. By changing the circuit of these feet, the computer can identify faults. Black and white films are popular on the market, all of which are downgrade flash. As flash processes and capacities increase, the internal structure is becoming more and more complex. While When new processes are launched, the product yield is not necessarily satisfactory.Some of the poor Flash files are insufficient capacity, some are unable to meet the requirements of life, some are unable to pass the test, and these Flash files that cannot meet the factory requirements are called downgrade flash. Downgrade flash is pushed to the market by manufacturers. For example, spectech is the downgrade flash of micron. The other part will be eliminated as waste products, but profits will drive these waste products to be acquired at a low price and enter the market. Some manufacturers use various solutions The soting board tool is used to test which functions can be used.. These manufacturers purchase flash Pay-as-you-goWith dozens of soting boards, thousands of soting boards are scanned together, Each day, there are hundreds of KB of production capacity.. Most downgrade flash is made into SD card, a few are used for USB flash drives, and a few are used for MP3 production. Most downgrade flash processing methods are to reduce the capacity for sale. No matter how it is handled, there are still potential problems. However, due to low prices, the downgrade flash market is growing.