Been using OMV 4 on my NAS for couple years on a Raspberry Pi 3 Model B. Very happy with it except that I have not gotten RSYNC to run. Been using USB Backup to backup my fileserver storage drive.
Decided to try OMV 5 on another same model Pi to test it/see how it works. Installed it first time and everything went fine, except I messed it up when assigning it a static IP address. So I wiped the microSD card and started over.
Install appeared to be good, but the Pi's DHCP IP address was undetectable. Putty could not see it anymore.
I've done it twice MORE, and found that everything is good thru installing Raspbian. Has a DHCP address, Putty sees it, etc. I can ping the Pi fine from Windows. But after installing OMV (with the script in the OMV directions), the Pi no longer has an IP address. I can see it when looking at the Pi directly with a monitor, keyboard. the "ifconfig" command does not show the eth0 interface. All it shows is inet 127.0.0.1.
What can be going on here? Three failures after an initial good install, following OMV's procedure EXACTLY every time.