Paired 68000 systems for fault tolerance - was Re: out-of-mainstream minis

Toby Thain toby at
Sat Jul 4 11:29:02 CDT 2015

On 2015-07-04 12:00 PM, Johnny Billquist wrote:
> On 2015-07-04 17:09, Toby Thain wrote:
>> I likely was thinking of Stratus, because I remember reading this before:
> Unfortunately, that paper can slightly confuse you. They talk about
> 68000-family, and if you read on, you'll find that the "current" models
> use the 68020...

Well, this being cctalk, it's just as interesting to discuss 
"non-current" models?

 > Also Sequioa, who also used two 68000's operating in lockstep,
 > described in P.A. Bernstein's paper

Just after I hit send, I remembered something a friend told me about a 
Sequioa installed in Moscow's first (?) credit card processing facility:

   "it was constantly malfunctioning, but it was fault tolerant"


>      Johnny

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