SS-10 -> Ultra Question...

Robert Dinse (nanook@eskimo.com)
Sat, 4 Dec 1999 17:23:36 -0800 (PST)


Well, those of you who have seen my postings before are probably familiar
with my Sparc-32 SMP stability problems.

To summarize, 4/670MP with quad Ross Hypersparc CPU's, 384MB of RAM,
and a 10-base-T/SCSI combo card runs totally stable under 2.2.13 as long as I
don't try to turn up two ethernet interfaces.

SS-10 on the other hand won't run for more than a few hours before
spin_lock hell. This is moving the exact same CPU modules, video card, and
SCSI controller that are completely stable in the 4/670MP.

Today I tried two things; I got an SS-20 chassis and tried that.
Unfortunately, same spin_lock() hell, it seemed to happen even faster actually,
longest uptime was 59 minutes.

When I've bothered David about this before, answer I got was "Get an
Ultra".. Ok, maybe that's truncated a bit but that's what it amounted to. So
I got an Ultra-1. Probably not a screamer but if I can find a stable platform
that doesn't raise the room temperature ten degrees I'll be elated.

I was under the impression that the same kernel that would boot on an
SS-10 would also boot on the Ultras. So I hooked up the disks that were
connected to the 4/670MP / SS-10 / SS-20, to the Ultra-1 and attempted to boot.

The cursor spins but then before even getting the SILO prompt I get:

Fast Data Access MMU Miss

... and it returns to the PROM prompt.

I tried booting a RedHat 6.0 CD and it boots fine. But I don't want to
wipe out everything I have and start over. Since it doesn't even get to the
SILO prompt I assume this is SILO related?

Can anybody tell me what I need to do to get this machine to boot and run
or do I have to re-install Linux and recompile all of my software?

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