Well, just thought I'd test out a problem I'm having with my tape drive
and FreeBSD on NetBSD...and the same problem exists.  Writing to the tape
with "dump 0bdsf 63 108000 9000 /dev/nrst0 /" will lead to the following
message being generated by NetBSD:

st0(ahc0:4:0): timed out in dataout phase, SCSISIGI == 0x6
ahc0: Issued Channel A Bus Reset #2. 1 SCBs aborted
st0(ahc0:4:0): Target Busy

(I'm not sure what the last was from, maybe the aborted dump and subsequent
 "mt status").

Darren