I have 2 drobos maxed out at about 32TBs. The blurays are my cold storage. Blurays will last a hell of a lot longer than hard drives when kept away from the sun. Just because you have hard drives that last 10 years, doesn't mean you're not experiencing bit rot.
Ta. I just googled and found blurays use a completely different technology to my old CD-Rs which used organic dye and were awful for lifespan. Though I think I'll stick to my Moore's Law type disk strategy where I buy a new HD every few years and copy the entire old HD onto about 15% of it.
