Dude, relax – it's Just a Bunch Of Disks: Our man walks you through how JBODs work
I'm one of those terrible people who "learn best by doing" and have always had a difficult time wrapping my head around exactly how high availability using "JBOD" external disk chassis systems was supposed to work. But my initial ignorance can work for both of us as we learn together.
As luck would have it, AIC was interested in having me do a review of its new XJ3000-4243S external disk chassis. The AIC device turned out to be a great unit and the extended tinkering time allowed me to learn quite a bit.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump