The Most Long Lastingest Storage?

What digital storage can retain information the longest? Recordable CD/DVDs only last a couple of years. A decade at most. Barring catastrophic disk failures, HDs seem to last the longest, but what about Flash Memory? These types of memories are increasing in capacity rapidly and they don't have any moving parts.

>>1
That's because you're buying cheap, low-quality media. Princo DVD-Rs will last for months, if any. Average media will last for some 2 years.

Taiyo Yuden media, on the contrary, may very well last for a hundred years (according to UV tests), and a new TY disc burnt with a quality burner like NEC's ND line or Plextor's will have even less parity errors than the original pressed media.