I got a Drobo 1st Generation and I´m thinking about buying a second Generation Drobo. Is it possible to read all disks with the new one and vice versa?
You can simply remove your diskpack from your 1st gen and place them in the second gen and turn it on, and it will function normally.
You cannot go back. (as far as i know)
KB says they’re interchangeable between 1st and 2nd gen Drobos as long as both units are running the same firmware version.