I have a setup with an old Zotac MB/ I want to upgrade it with an ASROCK C3558D4I-4L.
What should I do before upgrading the motherboard (except backup data) ? Any commands to run before the swap ? Or is it just a plug-and-play ?
Should be plug and play. Make a copy of your config beforehand and get install media ready. Worst case scenario, you reinstall FreeNAS and load the configuration file. Caveat about encryption keys if you use encryption on your pool. Make sure you have those and they are tested.