Hi,
Installing from CD works except GRUB and EFI failure. Does not boot.
Installing from USB drops the source, running Mountmedia (or mediamount) and then mounting on /cdrom fixes the issue but EFI and grub are not working.
Noticed strange behaviour of partitioning utility. Sometimes it creates partitions, sometimes it is unable.
Finally installed Mint LDME (based on Debian buster) in non EFI way, and then OMV on top. In this case some tweaking with apt sources list is needed - replacing debby with buster for omv extras. So far works without issue.