Hello,
first some informations about my OMV System.
I'm running OMV in a VM on a Proxmox Host,
I have a HW Raid Controller and Builded a Raid 5 with 5 x 2 TB HDD.
The Controller is passthrought to the VM and the Raid system is /dev/hda.
Everything worked fine. but a few day ago i made a mistake and I deleted the Filesystem. There was one XFS 8TB Filesystem.
Does anyone know how i can restore this Filesystem without loosing my data?
sorry for my english.. 
Leonderi