I would like change the OMV filesystem UUID on an exact copy of my existing install. I know how to do this using tune2fs. And I know I must change the UUID in /etc/fstab. But there is more to change and I don't know where and what. The copy with the changed filesystem UUID and changed fstab will not boot.
The goal I want to accomplish is to have both my original OMV and the changed copy connected to the box via USB so that I can select which copy to run from the system boot menu. I want to be able to boot OMV 4 or OMV 5 without having to physically swap drives.
Thanks for any suggestions.