Solved Has anyone done extensive research into long term data storage on an SSD?


Dru2

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So, let me clarify, because there seems to be some general confusion as what I am asking.

Suppose that buy a battery. That battery will have a shelf life. After x number of years, the battery will no longer be good because it very slowly over time depletes it's charge even though it is not connected to anything that draws power. This effect is known as "self discharge".

In very broad terms, an SSD works much the same. When you "write" data to an SSD you are placing a very tiny charge on memory cells. That's simply how an SSD stores data. The level of that charge can then later be read back to determine the contents of that memory cell. Over time, that charge will dissipate. Normally, this is not an issue so long as power is applied to the SSD on occasion.

My question was simply this: How long does power need to be applied to refresh all the data? Does it happen instantly when power is applied or does this happen only slowly over time as the controller performs tasks in the background?

I honestly don't think any normal end user can answer this unless they had very specific tools to test for that. I think the answer you seek will need to come from some engineer who's studied this.

All I can say as an end user is I've not seen any noticeable degradation of my drives in daily usage (I've got SSD drives in my systems going back to 2013). On the flipside I don't put them under stress tests in seeing how they still perform. I just use mine in a normal manner of any drive - read, write, move files around when needed.

The other thing I don't do is allow any of my drives to go beyond 70% (usually 60%) full. It's been said once an SSD goes past 70, it starts to slow down and become less efficient.

 

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