> BD-R (dye or non-dye, single layer or dual layer) 5 to 10 years
> BD-R (non-dye, gold metal layer) 10 to 20 years
> BD-RE (erasable Blu-ray) 20 to 50 years
I find hard to believe that info. Seems to be sustained by a single study. That would mean that bluray (specially the BR-R format) is a pretty flawed technology.
My educated guess would be something along these two threads:
* Higher data density => tighter tolerance => same physical degradation is more catastrophic (DVD ~7x density of CD, BD-R ~20/10/5x DVD density = up to 140x CD density)
* Produced later and therefore like all consumer goods, less regard for durability and more regard for absolute cost optimization
Basically correct, with a tiny caveat: there can be manufacturing defects where the reflective aluminum layer of pressed discs is not fully sealed and oxidizes over time.
> BD-R (non-dye, gold metal layer) 10 to 20 years
> BD-RE (erasable Blu-ray) 20 to 50 years
I find hard to believe that info. Seems to be sustained by a single study. That would mean that bluray (specially the BR-R format) is a pretty flawed technology.