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

[Toby Thain]

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:
>> http://pages.cs.wisc.edu/~david/papers/ibmsj1987_stratus.pdf
>
> 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"


--Toby

>
>      Johnny
>