> The selection of the 7400 was based on having the resources provided
> by a full debian distribution (not TSLinxu). So if
> I can't reliably boot from SD Card given inadvertent power cycles,
> then its not a viable platform for me.
This seems like a non-seuqitor. Do you think that a Debian Linux
distribution would give you ability to reliably boot given inadvertant
power cycles? Because it won't. Most "normal" linux setups barf if randomly
restarted, especially in restarted during file system repair. And I doubt
if any writable filesystem can guarantee NOT to fail under the conditions
you indicate.
It sounds like you need battery backup, and main power detection,
so that you can arrange to have long enough to shut down cleanly.
Having the main OS partititon(s) read only with volatile ramdisks for the
variable data is probably only foolproof way I can think of, without extra
hardware. If you have networik connectivity, you could use nfs, with sync
writes, to a server for storing any variable data.
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