Has data been burned successfully if

Is it safe to assume that the data one has burned onto a CD or DVD has been “successfully” burned if you are able to copy the data back to the harddrive?

Also, I know this has probably been asked before, but what are some main factors that can cause data degradation on CD-Rs and DVD-+Rs?

  1. generally, yes

  2. rough handling. storing discs in hot, humid or sunlit environment.

One more thing can cause degredation. Using cheap ass media…

  1. Generally yes as already mentioned - data verification tells you whether the written disc is an utter coaster at the time. But it does not offer info on the condition of the disc as it might become unreadable in a relatively short time. If you have any suspicion that the burning quality is bad, you should additionally perform an error scan every now and then.

  2. Covered already