Transferring from PC to PDP11, perhaps virtual devices?

Greetings all; I am trying to help out a friend with a data transfer process to simplify his business. The goal is to move a couple hundred Megs of data from a PC to a PDP11. Currently he has a DOS box with a Pertec controller, which he uses to copy data to a 9 track, and then pulls off on the PDP. This seems... inelegant, I can only assume there is a simpler way. I'm sure I've seen mention of 'virtual devices' on the list where a PC is running some software that makes it appear as a storage device to a piece of vintage hardware, but my Googling is making no headway in finding anything useful towards this end. Am I using the wrong terminology? Could someone point me in the right direction? Any advice? The machine in question is an 11/34 (An SMS FWT machine, actually), which has an 8" drive (unsure of it's model, it is built into the cabinet), Winchester, and a Pertec interfaced 9 track. Thanks; JP