[TUHS] Do you have any historical UNIX computers?

[Larry McVoy]

On Thu, Jun 12, 2025 at 06:01:23AM +1000, David Arnold wrote:
> > On 11 Jun 2025, at 23:56, Dan Cross <crossd at gmail.com> wrote:
> > 
> > ???On Wed, Jun 11, 2025 at 8:50???AM Warner Losh <imp at bsdimp.com> wrote:
> >>> On Wed, Jun 11, 2025 at 8:14???AM Henry Bent <henry.r.bent at gmail.com> wrote:
> >>> Sorry, I sent a response only to Warner by accident.  SunOS 4 runs just fine on MP machines, I have a dual processor HyperSPARC SS10 running right now.  The MP support isn't ideal by modern standards but for the time period it's fine, and it definitely works well.
> >> 
> >> Hmmm, I thought OS/MP was the only SunOS 4 that ran on MP machines.
> 
> At one time I had a SPARCserver1000 with 6 (out of 8 possible) sun4d CPUs. 
> 
> I can???t confirm it now, but I???m pretty sure it was not supported by SunOS 4.x; I ran SunOS 5.8 on it I think. 
> 
> Which is consistent with Wikipedia???s claim that SunOS 4.x supported sun4m but not sun4d (and the XDBus).

All correct.  I believe sun4m was the only SMP that ran 4.x, everything
else was Solaris.

As an aside, Solaris was slow as molasses on sun4d (aka Sun Dragon).  I was
pushing for a clustered answer and Ken Okin stole a couple of pallets of
IPXes and maybe some sun4m machines.  I did a clustered NFS server that
ran circles around Sun Dragon at the time.  Ken came down to the machine
room where I was running an NFS benchmark and watched for a while.  That
afternoon I had a $2 million budget to get started.  All Ken said was 
"Your lights blink more" which was true, the same benchmark on Sun Dragon
was less than half of the performance of the cluster.
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Larry McVoy           Retired to fishing          http://www.mcvoy.com/lm/boat