[haiku-development] Re: AMD Geode nano-size motherboard

> On 15/04/2008, Ingo Weinhold <ingo_weinhold@xxxxxx> wrote:
> > Actually that's not true anymore. Current Flash controllers shuffle
> > the
> >  blocks dynamically so that write accesses are distributed equally.
> > The last
> >  hardware test I read about it mentioned, that even after running a
> > test
> >  that permanently wrote to the same blocks for several weeks, no
> > errors were
> >  encountered.
> >
> >  I believe it was at least half a year or so ago, that I first
> > heard that
> >  the controllers use such a strategy. So I guess all modern devices
> > do that,
> >  now.
> >
> >  CU, Ingo
>
> Depends, actually. That is true for some setups (more modern, I
> guess?), however there are already plenty out there who have either
> less advanced controllers or no controller at all. For example, NOR
> FLASH can be directly mapped to memory (its interface is ROM-like:
> address lines, data lines, control lines), and on many embedded
> systems it is tied directly to the addressable memory space. That
> doesn't have a controller and requires a good filesystem in order to
> prolong its lifetime...

Exactly.
USB keys have that integrated because they must be formated with FAT by
default.
OTH, some SSD chips even require a proprietary (binary) driver under
Linux.

>
> I have this older headless PC which actually has a 256MB NOR flash
> chip (with no controller) where it stores Win CE and uses a
> proprietary filesystem which apparently does this shuffling.
>

And some other use custom file systems as you said.

François.

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