1) Does it apply to each cell
2) Any bad experiences in this area? Who had problems so far?
I've beaten the snot out of one of my Teensy boards without any failures. Even subjecting it to extremely low-voltage and erratic power supply conditions.
I've stopped worrying about write-cycles. If it happens, it happens. Throw away the processor (or re-purpose it) and get a replacement.
Anybody knows about what happens when it "failures" Fatal errors, like resets? Or something like write 12 and read 10?
If I remember correctly, the failures are: failure to erase (the previous value is read), stuck bit, "fading" (read value changes over time).
it is possible to confirm what Lefty commented about conservative information
I vaguely recall that problems start to occur after 1 to 4 million writes.
The folks at avrfreaks.net have done some destructive testing. This topic has been discussed here several times. Searching should get you lots of details.
It's important to remember that the write guarantee is [u]not[/u] for a certain number of write cycles but for a certain number of write cycles [u]and[/u] a retention time. For example, writing to a cell 1 million times may seem to work fine but the retention time may be reduced to six seconds.
Suggestions or other ideas/experiences?
Include a CRC with the data.