Important note for VMs using iSCSI disks.
RHV is only creating a connection between the VM and the iSCSI disk when the VMs are running, as this connecting is achieved through a symlink on the RHV Host.
This behavior leads to RHV only being able to take RHV Snapshots through the VM when the VM is running.
In consequence TVR is only able to take backups while the VM is in a running state.