What is the difference between 120G and 128G among ssd?

A. 1

120GB or 128GB?Why is SSD capacity different?
To start with the conclusion, both 120GB SSDs and 128GB SSDs are products with 128GB capacity from birth, and there is no significant difference in their use. In the case of a 120GB SSD, the manufacturer has set aside 8GB of space to improve SSD performance and extend its life before the product is shipped, meaning that the capacity that users can use in the actual use environment is 120GB. This 8GB space is called the 'Over Provisioning Area', also known as the OP area for short.
The reason for the OP area is that SSD's performance is noticeably reduced when its storage capacity is full due to its characteristics. This is called the dirty state, and the OP area serves to avoid the dirty state by leaving 8GB of spare even if 120GB of data is filled in the SSD. Through this, the performance of the SSD can always be kept constant, and the effect of extending the life can be expected. For 256GB SSDs, you can also see 240GB or 250GB of capacity, which is 16GB and 6GB of capacity allocated as OP areas, respectively. As the capacity increases, there is less concern that the data will be full, so 250GB SSD has an OP area, but it can be considered as a case of minimizing it.
http://it.chosun.com/news/article.html?no=2809935

Gentleman 8 years ago 0

120GB or 128GB?Why is SSD capacity different?
To start with the conclusion, both 120GB SSDs and 128GB SSDs are products with 128GB capacity from birth, and there is no significant difference in their use. In the case of a 120GB SSD, the manufacturer has set aside 8GB of space to improve SSD performance and extend its life before the product is shipped, meaning that the capacity that users can use in the actual use environment is 120GB. This 8GB space is called the 'Over Provisioning Area', also known as the OP area for short.
The reason for the OP area is that SSD's performance is noticeably reduced when its storage capacity is full due to its characteristics. This is called the dirty state, and the OP area serves to avoid the dirty state by leaving 8GB of spare even if 120GB of data is filled in the SSD. Through this, the performance of the SSD can always be kept constant, and the effect of extending the life can be expected. For 256GB SSDs, you can also see 240GB or 250GB of capacity, which is 16GB and 6GB of capacity allocated as OP areas, respectively. As the capacity increases, there is less concern that the data will be full, so 250GB SSD has an OP area, but it can be considered as a case of minimizing it.
http://it.chosun.com/news/article.html?no=2809935

A. 2

Aha... I learned a lot thanks to you.

Gentleman 8 years ago 0