Installing NetBSD 5.0 on MVME-147

[Mr Ian Primus <ian_primus%yahoo.com@localhost>]

I've got an MVME-147 here, 25mhz with 8mb of RAM. I'm attempting to install 
NetBSD 5.0 from tape. I'm using an Archive Viper 150 tape drive. I have 
replaced the battery in the MVME-147's NVRAM module, and have gotten the board 
to the point where it has the proper time and date, keeps time, sees the SCSI 
bus and properly identifies the two devices - the tape drive and a 4 gig SCSI 
hard drive.

I have written a boot tape according to the instructions in the FAQ, and that 
all seems to work well. The tape boots, loads the initial ramdisk, and starts 
to print messages to the screen. It identifies the SCSI devices, etc. Then, it 
complains:

WARNING: preposterous TOD clock time
WARNING: using filesystem time
WARNING: CHECK AND RESET THE DATE!

This seems odd, since typing the time command at the 147-Bug> prompt returns 
the proper time, date and day. (Sunday 7/12/9 22:11:24). But, this next bit is 
where it all goes horribly wrong:

 Mutex error: mutex_vector_enter: locking against myself

lock address : 0x000000000124cc20
current cpu  :                  0
current lwp  : 0x0000000000dae020
owner field  : 0x0000000000dae020 wait/spin:              0/0

panic: lock error

dump to dev 9,1 not possible
rebooting...

And then it reboots. Since this clears the screen, I had to quickly unplug the 
terminal's RS-232 cable so I could capture the error message to copy it down 
here.

So... I'm really confused. Any ideas?

-Ian