FWIW - went with the current OMV 6.x after a lot of thought about their app vs. Samba. My only real concern was integrating it into my LAN which is running a Samba Windows Domain Controller (on a separte CM4). Now it's time to figue out a data migration plan for my main workstation (with several TB of image and video files) along with the other machines on the network. For awhile instead of musical chairs, it's going to be musical storage media... :)

I just finished with a RAID 5 format of the 5 18TB drives and all went well.