[2.4.2-RELEASE][root@ FQDN]/root: sysctl kern.geom.debugflags=0x10
kern.geom.debugflags: 0 -> 16
[2.4.2-RELEASE][root@FQDN]/root: gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
gpart: /dev/ada0p1: Operation not permitted
Then I went rogue and tried my own:
[2.4.2-RELEASE][root@FQDN]/root: gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0p1
gpart: No such geom: ada0p1.
As you may see, I have no clue how disk geometry works. 😂 I'm very happy I didn't for more than a few minutes offline though, now I have time to schedule a reinstall. Whoever came up with backup & restores on pfSense is a f*cking genius! They way packages reinstall themselves and everything is back as before it just amazing. Thanks for your help!