Best CD or DVD Recordable Media for Longevity?

icepick72 asks: "I have recently purchased a collection of music (on CDs) for a music group that had their final tour last month. Without getting into copyright issues (I'm writing from Canada -- not that it necessarily makes a difference) I would like to know if any CD-R media on the market supports longevity. In the past Slashdot has discussed the degradation of CD/DVD media. How do I go about knowing what the good media is nowadays, and how to get a decent price on it? One company uses this foil or that foil while another uses polywatchmacallit. Looking for good suggestions, and an archived discussion on Slashdot for future reference."

Comments

Use Metal, not organic-dye, IOW, use DVD/CD-RW

[NOPteron]

Use RE-Writables, not WORM.

RW discs:
*blanking aneals metal-layer in disc
*burning quick-melts spots of metal in disc, so they freeze quickly to different crystallization than the annealed "normal"
*reading means reading the changes in reflectivity that occur ( or differences in polarization, in magneto-optical, IIRC ) in the METAL reflecting the laser-beam.

Write Once discs:
*new disc is "blank"
*laser "burns" organic-dye in writing,
*reading-laser "sees" the diff between burnt and non-burnt as less-transparent vs more-transparent, and the reflective-layer behind-it means that this is usable binary encoding. . . ( beam goes through organic-dye twice and then is read, or perhaps gets-eaten by the burnt dye and then its absence is read. . . )
*organic-dye decays

IF you care about archival, you then store complete versions of your files,
with checksums and ECC on RW discs.

IF you are using organic-dye write-once discs, then you are basing your ability-to-recover your stuff based on Estimates & Marketing Claims(tm). ..

Cheerses