Error correction always on - bad for undamaged tracks?

Question

I still have a lot of CD's that I still want to import. They are of varying quality. Most have been kept in binders, and depending on where they are in the binder, they are more or less scratched. No doubt some will have audio errors if I import without correction, while most probably will not.
What I don't want to do is import them all without correction and discover flaws at random weeks or months from now, and always worry that there are more lurking in my library that I haven't uncovered yet or will only hear when I play it on better equipment. I want to import everything once at high quality and never do it again, put my CDs in dark storage, and port this data around from drive to drive, computer to computer, pod to pod, for the next 70 years and then pass it on to my children.
I am inclined to leave error correction always on so that I'll be always covered if there are errors. My question is this: does this slightly degrade to good data that contains no errors? Does error correction somehow reprocess everything and somehow guess as to what's an error and what's not, and then reconstitute the final as it sees fit? Or is it very good at recognizing and correcting only true errors?

Answer 1

so no data loss? Slow is ok, as long as it's automated (which it is). One slow import is about 10 times faster than one fast import + errors discovered later + reimporting + deleting bad files and rebuilding playlists, etc.