How to Choose CD/DVD Archival Media. A superb blog post and huge 4 month long comment thread which will tell you just about everything you need to know on the robustness, suitability and reliability of optical discs for long term archive purposes. Hint: don’t trust your most precious data to these discs if you can help it, but if you do, look for one of the handful of good brands. Oh and do check out the DVDisaster Project.
To begin with, I do not recommend CD-RW, DVD-RW, or DVD+RW media in any form for permanent storage. This is mostly a no-brainer, but those discs are meant to be able to be changed after burning, and they are simply unsuitable for long-term archival storage. I also do not recommend DVD-R media due to DVD+R’s superior error correction and burning control.