[Simh] Recompile UNIX 7 kernel

[Angelo Papenhoff]

Hello,
I've got UNIX 7 installed in simh using Hellwig Geisse's instructions
and the document "Setting up UNIX".
The problem is that I can't recompile the kernel. I use an rp04 disk
and a tm tape drive and the following procedure to build it:
# cd /usr/sys/conf
# make all
cd ../sys; cc -c -O *.c; mklib; rm *.o
acct.c:
alloc.c:
clock.c:
fakemx.c:
fio.c:
...
---------8<-----------------8<----------------------
# make unix
ld -o unix -X -i l.o mch.o c.o ../sys/LIB1 ../dev/LIB2
# cp unix /nunix

Then I boot it and get the following errors:
: hp(0,0)nunix
mem = 178496
err on dev 0/0
bn=1 er=100000,4507
err on dev 0/0
bn=1 er=100000,4521
err on dev 0/0
bn=1 er=100000,4505
err on dev 0/0
bn=1 er=100000,4502
err on dev 0/0
bn=1 er=100000,4512
err on dev 0/0
bn=1 er=100000,4510
err on dev 0/0
bn=1 er=100000,4500
err on dev 0/0
bn=1 er=100000,4502
err on dev 0/0
bn=1 er=100000,4513
err on dev 0/0
bn=1 er=100000,4521
err on dev 0/0
bn=1 er=100000,4500
panic: iinit

I guess my disk layout somehow doesn't work with the new kernel.
Has someone experienced simliar issues?
I really need to compile a new kernel in order for the DZ11 to work :/