I heard on another post something about 0-ing out computer memory not being enough to stop a digital forensics expert with enough time and dedication from recovering the data. They said you needed to overwrite the data randomly at least 7 times to render it completely irretrievable. This seems completely unnecessary to me, unless computer memory has some sort of physical “residual memory” where you could identify the last change made to that bit. And even if that is the case, why wouldn’t overwriting every bit to 0, then 1, then back to 0 work just as well?
In: Technology
Kind of have to remember that there are no actual 1’s or 0’s in a computer.
It’s all thresholds of charge.
If it has enough energy or strength its a 1 else it’s a zero.
So… Lower the threshold and you can get a 1 if there is any charge.
When it erases it just lowers the threshold enough that it can’t be seen as a 1 normally.
To get it really clear requires a lot of power.
If you really want to make the drive data free. Destroy it real good.
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