4.3 installation problems on an 11/750

[MFHorn]

I'm trying to install 4.3 on an 11/750 with 1 ra81 and 1 tu80.  I've
got tape 1 of 1 on the tu80 and the 4.3 distribution cassette in the
tu58.  When I try to copy the mini-root from tape to disk, I get:

From: ts(0,1)
To: ra(0,1)
Copy completed: 446 records copied
From:

The installation instructions say it should report 205 records copied.
Otherwise, there are no errors in the copy.  The tape moves, the ready
light on the ra81 flickers and everything.

I then ^P back to the >>>, type "B DDA0" and run 'boot'.  It comes back
with

Boot
:

as one would hope.  I type in "ra(0,1)vmunix", and after a few seconds
I get

00000034  07

FFFFFFFE  15
>>>

Trying to boot 'ra(0,1)foo' gives the same error code, so it looks like
it's saying vmunix isn't on the partition.  Any ideas why copy is copying
446 records instead of 205, and what it might be copying?

To workaround the problem, we're probably going to install the ra81 on
another 750 already running 4.3, newfs partition a, copy / onto it and
then boot into single-user where we can build a custom kernel and load
in the rest of the system.  But we'd prefer to through the mini-root so
we don't have to bounce the other 750.

Any help would be appreciated.

Andy Rosen           | arosen at hawk.ulowell.edu | "I got this guitar and I
ULowell, Box #3031   | ulowell!arosen          |  learned how to make it
Lowell, Ma 01854     |                         |  talk" -Thunder Road
                   RD in '88 - The way it should be