I am sure this has been asked and answered before, but I could not find the answer. I want to know what is the best way to quickly determine how readable a disc is or if it is becoming unreadable? I primarily use burners to back up data for archiving. I would like to be able to test old (5+ years) CD-R's and new DVD-R's I have burned. I think I am looking for "RAW" errors and what the threshold number is that I should consider making a new fresh copy. I primarily use Nero for burning to CD's and DVD's. I also have PlexTools Professional 2.21 that has many advanced tests (C1, C2, FE, TE, Beta, Jitter, PI, PO and TA) to choose from.
What test should I use to determine the quality of my past burns and what number of errors should concern me?
Please excuse this newbie if I am asking the wrong questions, this is my first post to cdfreaks.