Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have old CD and DVDs. I am copying the files I have on these discs to my hard drive, but can I be sure that these files are not broken? I copy these files with no errors and don't want to keep the CDs.

Should I keep the originals just in case the copied files are broken or does a successful copy operation mean that the copied files are not broken?

share|improve this question
    
Successful copy means file is fine probably about as much as the file being unbroken before the cd/dvd was burnt. –  Logman Sep 25 '12 at 23:13
    
I would recommend you after you finish to copy the files, to find a box, put in all your CD's, close the box thoroughly and put it somewhere in a dry place in the basement. –  Serge Sep 25 '12 at 23:53
add comment

1 Answer 1

up vote 2 down vote accepted

If the OS standard file functions show no errors, you can be sure (on Data CDs/DVDs) that you have a correct copy, as all Data CDs have checksums and error correction data to reconstruct defective sectors to a certain amount.

Audio CDs however have a far less effective error correction, wich is usually ok, since small error aren't usually really audible.

You should however be aware, that CD-Rs / DVD-Rs have a relatively short lifespan ( 5-10 years) and DVD-Writer quality is not that good as it was 10 years ago. So you should backup important data minimum on 2 different DVD brands, because I also experienced that certain brands are less reliable or they had problems with a production charge.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.