[haiku-development] Re: AMD Geode nano-size motherboard
- From: "Alex Roman" <alex.roman@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Tue, 15 Apr 2008 14:15:26 -0700
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...
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.
Cheers
--
Alex Roman <alex.roman@xxxxxxxxx>
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