How to attach a raw (unpartitioned or non-standart FS) hdd from host node to VM hosted on that node

There are storage disk shelf connected to the host-node via FC. The file system on those disks OCFS2. How to connect the disks to a VM that hosts on that node?

You can attached a raw /qcow2 hdd only. In the VM, you need to format to your preferred FS