After you install the OS to the storage boot medium it is not written again. Basically, it is read only by default and virtue of the fact that the OS boots out of the, CF in yours and my case, into a RAM drive created at boot by the boot loader. From that point forward, all writes and logs are written to the RAM drive. Nothing is written to the CF card unless you specifically tell it to write the configuration to it from a telnet session.
I use a CF card in an ATA adapter as the boot drive in my NL setup.
I have never had, nor can I remember ever reading about, FS corruption of a NL install. I have been running it for in excess of 5 years now. The only thing to EVER bring down my NL box has been a hardware failure.
Mike
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