> did you try plugging the card into a computer and reading the
> suspect file?

The card has stopped working again, somewhere between 21000
and 32000 reads of that file. It was OK before I went to bed, 11
hours after refreshing it. It's also intermittently failing to read after
re-powering, just as it was doing yesterday. I think that rules out
external influence (most likely)

Disappointing. The project has had so much other work put in

The suspect file does download to a PC. It's reported to be the
same size as the original but that information is probably coming
from the header, not a received byte count

I'll have to compare the actual contents of the original vs the failed
to see if it's really corrupted, and also see if I can find a Data Error
response from the card

A project I did in Nov 2011 with a 4GB card has a similar read
pattern so I'm getting it sent back for testing. AFAIK it's been
powered up since installation, although the user isn't aware of a
problem. Have to admit that user isn't usually very observant in
matters like this. To them it could look to be working, as the
card operation doesn't affect the visual functions.

If it too has failed then I'll have learned a valuable lesson and
need to devise a Plan B=20

The two smallest files are generally the most often read so it
might be as easy as copying them to a 128kB RAM and reading
from there. And keep a back-up CD for re-installing (but how
long is a CD going to last ?)

Joe


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