On 9/1/06, Sonny Hung <sonnyhung@gmail.com> wrote:
> I really don't know. I've never heard the stats on this - I personally
> have not gotten any cards that have died.... the cards I have either
> have 0, 1 or maybe at most 10 write cycles since they are new...(my
> New Flash Cards 4MB)...
NOR flash (the first flash memory type) has a lifetime of up to a
million write cycles (if it's top-quality, that is; the lower bound is
about three orders of magnitude less). The mean for NOR flash is
about 100K write cycles.
NAND flash (much more common now) has a lifetime measured in millions
or tens of write cycles. Virtually all producers guarantee at least a
million even in the cheapest chips, in my experience.
Lifetime can be extended by controllers that remap the space to even
out usage over time, and to mark bad blocks as they arise. I'm not
certain these kinds of controllers are common in linear flash.
-- Tim
-- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries Official Newton FAQ: http://www.chuma.org/newton/faq/ WikiWikiNewt for all kinds of articles: http://tools.unna.org/wikiwikinewt/Received on Fri Sep 1 19:33:20 2006
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