What is the writing life of a solid state drive?

The write life of a solid-state drive is about [10-20] years. A 120G solid-state drive needs to write a 120G file to be counted as [P/E] once. Normal users use it normally, even if it is used every day Write 50G, complete [P/E] once every 2 days on average, and 3,000 [P/E] can be used for 20 years.

The write life of solid state drives is generally about 10-20 years.

Solid state drive flash memory has a problem of limited erasing and writing times, which is why many people criticize its short lifespan. A complete erasure of flash memory is called 1 P/E, so the life of flash memory is measured in P/E units. The lifespan of 34nm flash memory chips is about 5,000 P/E times, while the lifespan of 25nm is about 3,000 P/E times.

#With the improvement of SSD firmware algorithms, new SSDs can provide less unnecessary writes. For a 120G solid-state drive, a 120G file needs to be written to be considered a P/E. With normal use by ordinary users, even if they write 50G every day, P/E is completed once every 2 days on average, and 3,000 P/E can be used for 20 years (in actual use, more operations of users are random writes rather than continuous writes, so During the service life, the probability of bad sectors will be higher).

In addition, although each sector of the solid-state drive can be repeatedly erased and written 100,000 times (SLC), some applications, such as the LOG record of the operating system, may repeat a certain sector multiple times. Read and write, and in this case, the actual life of the SSD has not been tested. However, through the management of storage cells by balancing algorithms, their life expectancy will be extended.

SLC has a write life of 100,000 times, lower-cost MLC has a write life of only 10,000 times, and cheap TLC flash memory has a pitiful write life of only 500-1,000 times.

Extended information

TLC particle solid state drive, its erase and write times are about 1000 P/E, if we write 10GB to GALAXY ONE 120G SSD every day data, then the life of the SSD = 120GB * 1000/10/365 = 33 years

Generally speaking, before the solid state drive is completely broken, there is still a chance to enter the protection mode and preserve the storage in a write-protected state. The data on the disk is intact, giving users the opportunity to make a final backup. The figure below shows the SMART information of Toshiba TR200. ID 167 is SSD Protect Mode. The normal original value is zero, which can be read and written. When the flash memory life is approaching the end, the value changes to 1, which only allows reading and prohibits writing. .

The above is the detailed content of What is the writing life of a solid state drive?. For more information, please follow other related articles on the PHP Chinese website!