solid state drives?

[Daniel Feenberg]

On Fri, 22 Aug 2014, RW wrote:

> On Mon, 18 Aug 2014 12:36:29 -0500
> William A. Mahaffey III wrote:
>
>
>> None of the SSD's are/will be as durable as spinning drives for
>> writes .... That said, the SLC type are more durable than MLC or
>> TLC .... Also more $$$$ & usually only available in smaller sizes.
>> Good for a root drive, i.e. mostly read-olny operations. Swap &
>> everything else on spinning platters ....
>
> A typical modern 120GB MLC SSD will have a specified write endurance of
> around 8TB which is equivalent to  1GB a day for 22 years. They should
> be fine for most things where there's nothing doing heavy duty writing.

I sort of understand that - but does the SSD have the ability to move 
unchanged data around to even out the wear? That is, if I fill the drive 
with 100GB of never changing files, and then write lots of frequently 
changing files to the last 20GB, does this put all the wear on a small 
portion of the drive, while most of the drive suffers no wear at all? 
Maybe I should do a full backup and restore once a year?

Daniel Feenberg

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