* Cell: A minimum unit of digital data
* Bit (binary digit): A minimum unit for data storage
The “860 QVO series” of SSDs feature 4-bit, that is, QLC (Quad Level Cell) NAND flash. QLC NAND flash memory stores 4 bits per cell. Moving up from 1-bit to 4-bit drives, the amount of data that can be stored in a given cell increases. This means higher productivity as well as storage efficiency.
To store a single Korean character (2 bytes or 16 bits), 1-bit NAND requires 16 cells, while 2-bit NAND uses 8. 3-bit NAND needs 6, while 4-bit NAND just needs 4 cells. As the number of data bits that need to be distinguishable from each other in a cell doubles with each step, more precise control of charge is needed, and the technical difficulty increases drastically.
The “860 QVO” series: High capacity, high performance, stability, and reasonable pricing to boot
Samsung Electronics’ “860 QVO” series of new terabyte-class high-performance 4-bit SSDs reflects the latest memory storage market trends, which demand high-performance and high-capacity SSDs. The drives enable comfortable PC usage environments for users who need to work fast through large amounts of data.
The useful life of an SSD is measured using TBW (Total Bytes Written). Samsung backs the stability of the new drives with a warranty of 3 years, or up to 1,440TB total bytes written, all at reasonable prices.