Adata XPG SX8200 Is A Fast 2TB SSD

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derekullo

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"We don't use the software to test in the lab, but the results are very quick in comparison to others we've seen at CES 2018."

Is it normal to not run CrystalDisk in the lab?

It almost sounds like they are trying to hide something.
 

jloiacon

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Jan 12, 2018
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Sorry if this question is very basic ... do SSD's suffer at all from excessive read/writes? Is there a limit? Are they more for 'read mostly' requirements?

Thanks.
 

derekullo

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All ssds "suffer" from write endurance.

With SLC based ssds each cell that is written to has 2 values; 1 or 0.

With MLC based ssds each cell that is written to has 4 values; 00, 01, 10, 11.

With TLC based ssds each cell that is written to has 8 values; 000, 001, 010, 011, 100, 101, 110, and 111.

Over time the cells lose their ability to hold the correct charge and for example a TLC SSD that writes a 001 might lose the voltage required for the 001 and become a 000.

This decay on voltage is bad for your data.

SLC with only 2 values has the highest write endurance due to having the largest possible gap between its 2 states.

But for the most part write endurance isn't a factor unless you have an incredibly small drive, like a 128 gigabyte ssd and you constantly write and erase the entire drive each day.

Even my ancient 1 terabyte Samsung 840 Evo should last 60+ years at 50 gigabytes of writes per day.

https://www.anandtech.com/show/7173/samsung-ssd-840-evo-review-120gb-250gb-500gb-750gb-1tb-models-tested/3

By then I hope to have a 1 petabyte drive, at least lol.


https://www.anandtech.com/show/5067/understanding-tlc-nand

Explains write endurance in much more detail.


Reading data does not harm the cells at all.


 
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