This post comes from an idea I had to allow me to easily carry a ZFS mirror away from a site and back again, we didn't need much space - only 5gb - but it had to be mirrored in triplicate, one copy to stay locally, one going into a fire safe on site and the third to be carried by the IT manager off-site each evening. The trouble? A near zero budget, so for a little over £45 we have a 14GB ZFS mirrored pool, across three 16 GB USB Flash drives and one three port USB 3.0 hub. It was perfect for the task at hand, extremely portable, and cheap, I thought the same approach may help anyone trying to get to learn a little more about ZFS, a student or even someone using a laptop as a small office server - as the laptop literally has its own battery back-up system built in! It's not the fastest solution, its in fact extremely slow, but as an entry step it's perfect. See the full video below, throughout the commands I list were in use... Commands: Listing Disks by ID... ls /dev/disk...
