After a crash of my systemdisk I decided to go for OMV5 instead of recovering the backup.
So I disconnected my Datadrives, Installed OMV5 on a fresh disk, made the setup (network, user...).
After reboot and check that everything ist working I shut down the server, reconnected the data-drives and fired it up.
The raid6 was recognized correcect, also the filesystem.
I mounted the filesystem but I can't see it anywhere.
In OMV2 I could see all my shares in \media\....\, but in OMV5 I only see my dvd-rom in \media\
The Filesystem-tab in the gui says the filesystem (ext4) is mounted, but where ???