I have a little nettop machine that's been running Ubuntu 14 server for a while, along w/ a USB3-attached RAID device which I formatted using ZFS (installed from http://zfsonlinux.org).
Setup's worked fine 'til I upgraded my server to Ubuntu 16, not realizing that ZFS had been formally baked into it! Now I need to rebuild/re-add my existing ZFS device without nuking the existing content.
Any pointers for how to do this with a minimum of risk?
(and, yes: I know I should've read the updates to v16 before upgrading. And, yes, I have a backup but it's a huge amount of data and I'd rather not have to restore it if I don't have to).
