I am trying to mount an existing MDADM RAID10 array (BTRFS fs on top) with a new OMV installation.
MDADM is finding the array (as md2) and reports no problems (in GUI and CLI) but when trying to mount the fs I always get the following error:
wrong fs type, bad option, bad superblock on /dev/md2, missing codepage or helper program, or other error.
I tried
mount /dev/md2 /srv/disk1
mount -t btrfs /dev/md2 /srv/disk1
mount -t ext4 /dev/md2 /srv/disk1
OMV GUI can see the fs as BTRFS but also throws errors when mounting inside the GUI.