There
is an interesting story today in the UK newspaper, The Independent, about
the claims manufacturers make about the lifespan of their CD-R's. They
are the easiest means of archiving digital photographs today, but if disc
is useless after 2 years, perhaps another archival medium is required.
If CD-R is still your chosen media, then purchase the best, record at
the recommened speed for your drive, and store in a cool dry environment.