New materials to improve optical media reliability

I just posted the article New materials to improve optical media reliability.

 Do you remember when floppy discs were the only way to  store data? Do you remember how uncomfortable and unreliable these were to  use? Then came the new and exciting technology of optical...
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If you look at the material in the article another way, it implies that they admit that bonding on current DVD media isn’t very good. Correct me if I’m wrong but isn’t Araldite a brand of epoxy glue? So the solution to bad bonding is to use epoxy to glue the disc layers together and the solution to discs getting scratched to coat the discs with epoxy??! Probably jumping to conclusions but that was what it seemed like the article was saying.

I’m not a specialist at all… but i think, when optical storage became smaller and smaller, our "real world " still the same. I mean, if you scratch a cd -r with a pin, you maybe lost 10 mb, if you do the same on dvd-r, this must be 60 or 100 mb lost and if you do that on a blue ray, this must be in in the 500- 700 mb lost… I know, it’s just an example, don’t bother me about this " easy " example… I just said that our world still the same, an "other world " smaller and smaller. Same dimensions but bigger volume, so, for me, sure for example blue ray is not a " long life support " cd-r = 800 MB max on it dvd-r = 4500 MB max and same dimension Blue Ray = ± 25000 MB and same dimension too. Same dimensions, up to 30x more datas storage than cd-r, but exposed at the same conditions for use, manipulate and … So wait and see, but be prepared to protect your blueray dvd with a bigger protection at a level you’ll never knew like this before… :B Sorry for my english :slight_smile: :slight_smile:

I thought that it was a “common knowledge” that DVDs are more resistant to time degradation, because in CDs the reflective aluminium layer is outside directly exposed to oxidation (and physical damage!), while in DVDs everything is between two plastic layers (and I’m not talking about Princo DVDs at the moment)? Well, I don’t throw away my discs orthogonally to test bonding quality as manufacturers do… but I think it’s less critical than oxidation germ. And CDs have layers, too. :wink:

I would take issue with the second sentence as far as how unreliable floppies were. I have floppies that are over 17 years old that are still good. I wonder if even the optical media considered to be high quality will last that long. Not trying to argue that magnetic media is better than optical, just that I never had any issues with magnetic media that was not self inflicted, yet, I’ve had, albeit cheap, CD’s that “rotted”. Hell, I even left my disks on top of my stereo speakers for long periods of time and never had a problem, and that was always considered a “no-no”. :d