[TUHS] AT&T SVR4 MP RAS?

[Kevin Bowling via TUHS]

On Mon, Apr 13, 2026 at 1:28 PM segaloco via TUHS <tuhs at tuhs.org> wrote:
>
> Passing this one up, but wanted to share there is some late oddball SVR4 box on eBay, might be significant:
>
> https://www.ebay.com/itm/377109437421
>
> After the link is a box set for AT&T UNIX SVR4 MP-RAS.  Looks to be SVR4 with some fault tolerance stuff from NCR?  I haven't done my research but in case someone else is looking to get into the UNIX archival business, I'm not jumping at this one.

Interesting, I grabbed it because I have a non-zero chance of running
into a NCR 43xx at some point.  I'm somewhat surprised by the AT&T
branding and not NCR.. with the 1996 date.

This era of ATT-IS/NCR had some very interesting x86 systems:
https://www.ardent-tool.com/NCR/Docs/ncr3000overview.pdf
http://ps-2.kev009.com/ncr3xxx/thecorememory/html/ncr_system_3000.html

What little I gleaned back in the day, before some of this was memory
holed, is that they sold some of these 128-256 CPU x86 systems and
they were basically synonymous with Teradata and used by large
retailers like Walmart to do datamining.  Would have been impressive
to see one in the early 90s.

The smaller ones were normal PC servers, but they did have SMP and
pushed it a few years before most other vendors who waited for Intel
with the glueless P54C SMP and APIC.

> - Matt G.