> Did you check your signals with a good oscilloscope? What you
> are experiencing could it be noise or transmission line effects, etc?

That was my first thought. Perhaps some mains noise or interruption
mid-read. Hard to tell

If that's what had happened I expected it to run normally after being
powered up. That's when I discovered it would run intermittently. I
must have re-booted it at least a couple of dozen times the next
morning and each time it would stop after a short while and always
on the same one of the two files.

I've had the analyser on all comms and power lines but not found
any disturbances before or during read failure

It's most perplexing. I've looked around the web but not yet found
any mention of reads causing data degradation.  If it doesn't then it's
hard to explain how the file can be read successfully thousands of
times and then start giving trouble.

The seemingly random time to failure after each power-up is also
odd. You'd think that it would not work instantly rather than at any
time up to a few minutes.

All I can do for the time being is just let it run until it fails. After th=
e
format/reload the file has been accessed almost 20,000 times so
perhaps it'll fail again tomorrow.

If/when it does I hope I'll learn something useful.

Joe=20



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