TMSCP issue?

[Dave McGuire <mcguire%neurotica.com@localhost>]

  Hi folks, I'm running a 9.3 kernel on a 4000-705A, with a TMSCP tape 
coupler (Emulex QT13) and a drive that looks to the kernel like a TU81.

...
[     1.000000] mtc0 at uba0 csr 174500 vec 774 ipl 17
[     1.000000] mscpbus0 at mtc0: version 2 model 5
[     1.000000] mscpbus0: DMA burst size set to 4
[     1.000008] mt0 at mscpbus0 drive 0: TU81
...

  The tape subsystem works fine under VMS in this configuration, but 
trying to access it from NetBSD, say by doing "mt -f /dev/mt0 status", 
just hangs, with no tape motion and no output.  Pounding on ^C will 
eventually kill the process.

  Does anyone have any suggestions on this?  I've not yet tried it 
under simh.

           Thanks,
           -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA