Invisible <voi### [at] devnull> wrote:
> On 08/03/2012 02:50 PM, Aydan wrote:
> > Well I have two SSDs and I'm not a performace freak.
>
> You clearly have a hell of a lot more money than I'll ever have.
>
> Or rather, you /had/ a lot of money... ;-)
>





> You would expect an SSD to blitz a HD for random access. But even just
> for read access, you would have expected a purely electronic device to
> be many billion times faster than a mechanical HD. And they aren't, for
> some reason...
>
> Write performance is another matter. Apparently you have to bulk-erase
> cells before you can write them again. So I can understand that being
> slower. Even so, you'd think some kind of parallel processing
> arrangement could hide some of that...

TRIM is the keyword. Pages are erased during idle time of the disk.
The transfer speeds come from the Addressing delays and acrual write and read
timing constraints. Yes, silicon memory does have a finite bandwidth.

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