[ovirt-users] "ISCSI multipathing" tab isn't appear in datacenter settings

Hello. We have 6 servers in our cluster, which use 2 storage through iSCSI connections. Each storage has 2 nodes. Each node has 2 IP addresses in two different VLANs. Each host has 2 networks in this VLANs, so, the iSCSI traffic is separated from other types of traffic. I want to turn on iSCSI multipathing beetween hosts and storage, but "ISCSI multipathing" tab isn't appear in datacenter settings. But when I'm add a additional storage domain, "ISCSI multipathing" tab is displaying. If I want to detach this additional storage domain, "ISCSI multipathing" tab is disappear at once. Why is this happening?