DvD data life

[Blacknight2004]

I've just started backing up DVDs and I was concerned with data life.Has anyone ran into the problem of "DVD rott". I've seen data projection on Verbatim of more than a 100 yrs of data life . I've burnt several hunderd CDs, and I have exprienced Sony brand CDs that have only lasted 3-4 months. Several other CD brands have also shown signs of "rott" in less than 1 yr. In the short time of DVD back-up, I can attest to the inconsistency of blank DVDs. It's a shame that a 10% failure rate is acceptable in the DVD manufacturing community.