I'm running into an issue writing to my VTL. Reserves are being put on drives in the VTL and we are not sure why. I'm reading various posts where they recommend turning off DPF (data path failover) and CPF (control path failover). Some of the information is published by IBM. Is anyone aware of this situation. My TSM server runs on AIX, my vtl is emulating a 3584 library writing to 3592 tapes.