Solid-state drives (SSDS) have been playing an increasingly important role in our lives since their birth. As demand has increased, the capacity of SSDS has gradually evolved from the basic entry-level 120 GB to the current 960 GB, 1 TB, and 2 TB……
Obviously, large-capacity SSDs can meet more of our storage needs, but large capacity is obviously not the ultimate reason we buy them, high performance and long life are the real advantages of large-capacity SSDs.
We can find that the larger the capacity of the SSD, the faster its sequential read and write speeds as well as random read and write speeds accordingly. This shows that there is a positive correlation between capacity and performance.
Likewise, high-capacity SSDs have an advantage in terms of lifetime. The life of flash memory is measured in P/E, which directly determines the final write data of the SSD. Therefore, for SSDs using the same type of particles, the larger the capacity the more data are written, compared to the smaller capacity writing double the amount of life is relatively longer.
Let’s say that you and I are both long-distance runners, training with the same intensity and time every day. You have two pairs of shoes to change, and after a few months, your shoes are worn out and forced to stop running; while I have two hundred pairs of shoes to change every day, a few years have passed, and I can still continue to run.
Isn’t the result obvious?
The reliability of solid-state drives also includes the number of erasures. The capacity of the SSD and the corresponding number of erases will be less, a direct result is the use of a long time.
And, solid-state drives are reserved blocks, also known as the bad block management mechanism. The larger the capacity of the SSD, the larger the reserved blank blocks. It is not exposed to the operating system but is exposed to the underlying mapping relationship. This part can be used for write acceleration and to reduce the dependency on block recycling. When there is a block working erratically, it is used as a replacement, the block will be blocked, and the reserved block will have less and less space. When the reserved blocks are zero and bad blocks occur again, they are exposed to the OS.
In summary, is the answer to this question obvious?
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