Media becomes unreadable afterwards

I’ve seen a number of comments mentioning that after some period of time, media that was readable becomes unreadable. I’ve been under the impression that when information is written to a CD and DVD becomes permanent. From what I’m reading, this seems not the case. Is this true? If so, is it only some media that has this problem? Is it burner related? Or a combination of both?

Moved to the media forum.

The anstwer ot all these questions is “yes, sometimes”
Suggest you start by reading the media FAQ.

As rdgrimes indicated, use the faq and search. And yess, all "can havea factor. Also a factor is sticky lables adhered to burned discs, the glue can corrupt the burn…, felt tip markers …improper storage…yadda yadda