> Hello all,
>           I've been asked to debug a problem with a data recorder that
> writes to a compact flash chip.
>
> Basically, every test consists of first writing a file of all zero's to
> the compact flash chip.  The system then after this is done, begins
> overwritting the zero's with data.

Can you repeat the problem with another compact flash? Preferably of another
brand.

That would most likely rule out that particular CF being bad.

> The problem they are having is that, about 1% of the time, the system
> will come back with all zero's instead of the three waveforms the
> device should have recorded.  They are sure the waveforms were present
> at that time and sometimes the signal will record for awhile and then
> disappear again.  (The three waveforms are sent to the pic's a/d and
> the pic then writes to the CF).

OK. Can you insert an *immediate* check after *each* write? It could be
possible that some writes take longer than expected or just doesn't
get written.

I *hate* intermittent problems.
--
D. Jay Newman           !
jay@sprucegrove.com     ! Xander: Giles, don't make cave-slayer unhappy.
http://enerd.ws/robots/ !

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