FreeBSD 13.0 R2 is out. Release due end of the month. It's a great improvement from 12. I finally upgraded my UFS laptop to GELI encrypted ZFS root. Time to get with the program!
It was an easy process.
Reboot into new system.
FreeBSD 13.0-RC2 Now Available
Adding another drive -> read https://www.cyberciti.biz/faq/how-to-add-encrypted-zfs-pool-on-freebsd-server/
I noticed an issue. If you create a new zpool named "home" it will magically mount this to your home directory. Here's a weird thing though, for some reason I had an actual directory /home instead of a symlink /home -> /usr/home - this was a new install. Normally I would never do such a thing as create /home. So I'm not sure why.
Here's the problem this caused: I had 100GB of files in my home directory and i put these in a backup /usr/home/backup. When I booted into multi-user mode, /usr/home was empty but the drive use showed the 100GB were on the drive. mounting my "home" zpool put it on /home. /usr/home remained empty. Booting into single user mode /usr/home had the backup files. But the drive is mounted read-only. As soon as I mounted the drive read-write the files disappeared again, /usr/home was empty. So I could live with my home directory in /home/waitman and I had the backup on a USB drive so nothing was lost, but it was still using up 100GB on the drive for nothing. I noticed that /home was a directory and not a symlink, when I deleted the directory and made a symlink the backup files in /usr/home reappeared and I could delete them and free up 100GB of space. Mounting the home zpool now mounts to /usr/home where it should be, and the /home now symlinks to /usr/home. So that was a nutty thing but it's resolved.