I'm looking at some archival grade DVD by Taiyo Yuden. Are these better or worse than the regular DVD-R? These are for backing up movies, any issue working in DVD Players?
According to the TU desc the normal disk shelf life is 100 years. Your great, great, grand kids could use it, provided there is anything capable of playing them in that far distant future.
Can you give us a pointer to those disks ? The only references I've seen to 'archival' disks have been to the gold disks that are available from a handful of sources.
Indeed. Those figures mean little..rather like the figures that printer manufacturers quote for their inks. However the technology is well-understood. See here for details...
There are claims of 100 years for some "archival" DVDs and 300 years for the CD-R equivalent, an indication of the lesser stability of azo-cyanine versus phthalcyanine as well as the sandwich construction of a DVD. These claims are based on projections of the increase in POF or C2 errors over time based on tests on discs subjected to levels of heat and humidity reaching 85 degrees C. and 85% relative humidity. The test data are accumulated after about 2,000 hours of testing.
What the data don't say is that NOT ALL DISCS are projected to reach those levels. Only MOST of them. NEVER ALL of them. The projections do not take into account the oxidation of the polycarbonate or the change in DVD tilt after the bonding agents begin to fail in their adhesion. As for excitement about 100 years? The world's oldest recording tape will be 70 years old this November, and, though fragile, still plays. Nobody cares.
Quote:As for excitement about 100 years? The world's oldest recording tape will be 70 years old this November, and, though fragile, still plays. Nobody cares.
wow, that's interesting, as you stated, nobody cares but i learned a new factoid thanks to you today~ :) have a good one!
Taiyo Yuden 4x dvd-r TYGO1/ 8x dvd-r TYGO2/ 8x dvd+r YUDEN000T02/ 16x dvd+r YUDEN000T03
Verbatim 8x dvd+r MCC003
Verbatim dvd+r DL (MKM001)= flawless no compression backups
"Do Yourself A Favor, Use The Good Stuff
TY & Verbs 4 Life~ :)" ~docTY~
"Its better to be quiet and appear stupid, then to open your mouth and remove all doubt."
I am always prepared to recognize that there can be two points of view - mine and one that is probably wrong - John Gorton
Thanks, Doc. The interesting thing is that if anyone had to read that tape, all it would take is manufacturing a magnetic head with just the right gap length (about 1/4 inch; the width is less important since the tape ran about 30 ips). That is fairly easy to do. But 50 years after CD or DVD players are no longer made and one finds a playable disc, how can anyone make a laser diode with the exact read wavelength (870 or 450 nanometers), a chip with Macrovision decoding, the right filtering, proper decoding for MPEG-2, a controller chip with the exact speed, etc.? The more complicated the format, the less likely it's going to be to be able to read any media that survive. (And with Blu-ray, there is so much copy protection that even with brand new equipment there is still only a 50/50 chance anyone is going to be able to read the disc!) The world is getting goofy.
