[rescue] Re: ultra 1 with weird errors

Frank Van Damme frank.vandamme at student.kuleuven.ac.be
Wed Aug 6 06:30:09 CDT 2003

On Wednesday 06 August 2003 13:08, Gavin Hubbard wrote:
> By coincidence, I picked up an Ultra 170e this afternoon that had this
> exact same problem. It would get to OBP fine but whenever I tried to boot
> it from disk or CD it gave the "Fast Data Access MMU Miss" error.
> I turned the diag-switch on and the diag-level to max and this showed that
> someone had loaded the memory in the wrong order. In this particular system
> there was 64MB in banks 1,2, and 3 while bank 0 was empty.

Hihi... pretty obvious... if you can figure out which is bank 0 ;-)

> Interestingly the system was detecting all of the memory (192MB) at startup
> and appeared otherwise quite normal (no warning messages about misloaded
> memory) and it was only at boot-up that it failed. Rearranging the memory
> so it occupied bank 0,1, and 2 immediately fixed the problem.

I think OBP should be able to do better then this, don't you think so?

> I'm not saying that this is neccesarily the fault with the system you are
> looking at, but it is definitely worth checking out as a possibility.

I am actually not looking at that system anymore, the last time I mailed the
guy in question he allready sold it. I'll pick up an ultra5 soon though :-)

Frank Van Damme    http://www.openstandaarden.be
~~~~~~~~~~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Je pense, donc je suis breveti."

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