How to transfer data FAST?

Hi, after several cleaning orgies, my SMD disk (AMPEX DFR-996, see other posting) seems to start working. Now I want to backup the data contained on the disks. These are RSX-11 volumes. I cannot read them under RT11. And I don't know if I can make a diskette RSX-11 to inspect the data. Or is there a preogram which runs on rt11 and is able to understand rsx11 filesystem? That would be great! My first idea for the backup was "copy/device dm0: tt:" which works. But there is no error correction and still only 19200 baud. So tell me, what are the really cool methods to transfer data between a PC and a real PDP11 at a reasonable speed? SCSI controller and SCSI disk? Something else? Ethernet? Or is a backup over serial line a normal thing...?