Disk-to-disk-to-tape backup when using Live migration

Hi.

I'm wondering if DPM 2012 sp1 supports disk-to-disk-to-tape backup when protecting VMs in Hyper-V 3.0 CSV 2.0 cluster with live migration. In the documentation it says that backup to tape, disk-to-tape or disk-to-tape-to-tape are not allowed but I can't figure out whether that includes disk-to-disk-to-tape.

Thanks

/Erik