NetBSD Boot tape for MVII

Yes, I Read The Freaking Manual. I Googled. I went so far as to peruse the ClassicCmp mailing list archives. *Those* people are *strange*! I think the DEQNA board is dead, even before I started moving things around on the QBus. (Yes, there'll be Yet Another "Broke My QBus" Post) I haven't ever been able to get it even to light up the AUI terminator. Next choice is to boot NetBSD off the TK50. I have NetBSD running on the VS4000/60 and a TK50Z-GA that works. I can tar to /dev/rst0 and then retrieve the archive all day long. When my boot tape wouldn't boot on the MV, I wondered if its TK50 is toast, so I've been trying to boot the 4000 to test the tape. All the sources say to: # dd if=boot.fs of=/dev/nrst0 # mt -f /dev/nrst0 rewoffl Then to boot from the tape: The tape saws around for a minute or so, shows; MKA500 then rewinds and aborts to console Trying it on the MVII gets essentially the same results. No meaningful error message, just the HALT instruction. A clue would be greatly appreciated. Doc