How to distinguish the quality of SSD

The quality of SSD mainly depends on the quality of NAND Flash particles, which are divided into four grades on the market. Four grades are ranked according to the quality from good to bad, respectively, Original Die, Good Die, White Die and Ink Die / Dismantling Die / Refurbished Die.

The first step: preliminary judgment from the surface logo of NAND Flash particles

NAND Flash particles are mainly supplied by Samsung, Toshiba, Western Data, Micron, SK Hynix, and Intel. These original manufacturers either print the logo of the original factory on the qualified NAND Flash particles, or sell the Flash Wafer materials to the original OEM customers to package as their own brands, which are the best quality NAND Flash particles.

The second step: further analysis from the information about NAND Flash particles.

The surface of NAND Flash particles contains a certain information such as brand logo, encoding model, and production date. It need to be further analyzed by encoding rules and production date of NAND Flash.

The third step: accurate judgment from the actual test data of the SSD.

The most effective way to judge the quality of SSD is to test. For instance, reading and writing performance, data storage, high and low temperature aging, life, power consumption and other tests can reflect the real situation of SSD. Shenzhen Flash Memory Market Information Company Limited recognizes the importance of product quality so that  it establishes a quality analysis center to provide quality analysis services for the market.

The following list illustrates analysis of SSD quality from NAND Flash particles information

1# NAND Flash particles logo is Samsung trademark. The NAND Flash is 19nmTLC processing technology, which was put into mass production by Samsung 3 years ago, and it is resolved from code 437 that this chip particles were produced in the 37th week of 2014. Thus, It may be  a dismantling die.

2# NAND Flash particles are adopted with the SanDisk A19’s  1ynm MLC, which was mass-produced around 2013 or 2014, already discontinued. It may be a dismantling die.

3# The surface code and the original brand logo of 3# NAND Flash particles are blurred and it is resolved from code 449 that this chip particles were produced in the 49th week of 2014. Thus it may be a dismantling die.

4# Through the inquiry, it’s known that the ID number of Flash is inconsistent with the SK hynix brand logo printed on the surface of 4#NAND Flash particles, so it may be a refurbished dismantling die.