Life of solid state disk for mining machinery

Generally 5-6 years

Generally, the times of erasing and writing of SSD are about 3000 times. According to the usage, it can be used for more than 20 times

a complete erasure of flash memory is called a P / E, so the service life of flash memory is based on P / E. SSD generally has a service life of 3000 erasures. Take a hard disk with 120g memory as an example, it needs to store 120g memory to calculate a P / E. if PE is completed every two days, it also needs 3000 * 2 / 365 = 16.44 years, but the daily write volume is less than 50g, so the service time is longer

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extended data:

methods to prolong the service time of solid state disk:

1. Using software optimization correctly

is a common and immediate function, which should be the complete erase function. Through this function, we can easily complete the full disk format and fragment cleaning of solid state disk. As we all know, after long-term use, solid-state disk often proces a large number of rendant files, which affects the performance and life of solid-state disk. Through the safe erasure function, we can quickly and effectively erase the rendant files, so that the solid-state disk can be reborn

of course, it should also be noted that too frequent complete erasure will also affect the actual life of flash memory particles. It is recommended to conct a safe erasure once every three months or half a year

2. It is the bottom line to prohibit disk defragmentation.

the principle of disk defragmentation is to read and write the whole disk space to realize the integration of fragmented files, which has no effect in the era of mechanical disk. However, in the era of solid-state disk, because the life of flash memory particles is limited, a full erase will rece part of the life of the solid-state disk. In fact, it is very uneconomic and meaningless to sacrifice life for performance maintenance without much improvement

finally, in the design of SSD, there is a trim mechanism that can automatically defragment files

3. Keep the purity of SSD

SSD is mainly used as system disk to improve the overall performance of the computer. In other words, solid state disk is only used as system disk and mechanical disk as storage disk, which is a wise choice to improve the life of solid state disk

to avoid large-scale storage of solid-state disk, and only as a system disk, it can also avoid the impact of large-scale file reading, writing and storage on the life of flash memory particles. To keep the purity of solid state disk, in a sense, can also improve the service life of solid state disk

The lifetime of SSD is about 10-20 years

solid state hard disk flash memory has the problem of limited erasure times, which is also the reason why many people criticize its short life. A complete erasure of flash memory is called a P / E, so the lifetime of flash memory is measured in P / E. The lifetime of 34nm flash memory chip is about 5000 times P / E, while that of 25nm flash memory chip is about 3000 times P / E

with the improvement of SSD Firmware algorithm, new SSDs can provide less unnecessary writes. A 120g solid-state disk, to write 120g files to do a P / E. The average user can write 50g P / E every day and complete it once every 2 days. 3000 P / E can last 20 years (in actual use, users write randomly rather than continuously, so the probability of bad channel will be higher within the service life)

in addition, although each sector of SSD can be rewritten 100000 times (SLC), some applications, such as log recording of operating system, may read and write a sector repeatedly, and in this case, the actual life of SSD has not yet been tested. However, the life expectancy of the storage unit will be prolonged by balancing algorithm

SLC has a write life of 100000 times, low-cost MLC has a write life of only 10000 times, and low-cost TLC flash memory has a write life of only 500-1000 times

extended data

the number of erasures and writes of the solid-state disk with TLC particles is about 1000 P / E. if we write 10GB data to the one 120g SSD every day, the life of the SSD is 120GB * 1000 / 10 / 365 = 33 years

generally speaking, there is still a chance to enter the protection mode before the solid-state disk is completely broken, The data stored in the disk is kept intact in the state of write protection, so that the user has the opportunity to make the final backup. The following figure 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 nearly exhausted, the value changes to 1, only read and write are allowed

The lifetime of SSD hard disk is equal to the total capacity multiplied by the number of writable times divided by the total amount of data written

for example, a 1TB hard disk can write 5000 times, while the user will write 100GB of data every month, and the service life is 1000 * 20000 / 365 = nearly 200 years. However, the actual use is certainly shorter than the nominal one. Basically, a piece of ordinary household solid state can be written into 2000-3000tb, and the instrial grade can be multiplied by 10 at most

extended data:

1. SSD structure:

solid state drive based on flash memory is the main category of solid state drive, and its internal structure is very simple. The main body of solid state drive is actually a PCB board, and the most basic components of this PCB board are control chip, cache chip and flash chip used to store data

2. Main control function:

control data writing, error correction, erasure, etc., which can realize performance optimization, data encryption and write protection function, data security erasure mode, self destruction function, etc

3. Advantages

flash memory is used as the storage medium, and the reading speed is faster than mechanical hard disk. The solid state hard disk does not need a magnetic head, and the seek time is almost zero. Associated with it is the extremely low access time. The seek time of the most common 7200 RPM mechanical hard disk is generally 12-14 MS, while the solid state hard disk can easily reach 0.1 ms or even lower