RE: Named PTF's - was CPF324A

[Neil Palmer <neilp@xxxxxxxxxxx>]

I recall reading that cover letter too, but do not have a copy of it.

...Neil





"MCPARTLAND, Stan" <stanley.mcpartland@bently.com>



        To:     "'midrange-l@midrange.com'" <midrange-l@midrange.com>
        cc:
        Subject:        RE: Named PTF's - was CPF324A


> From: Steve Landess
>
> This may be stuff of urban legend, but I heard about it in the mid-90's,
I
> believe...
>
> Apparently some AS/400 customers were having intermittent problems with
> their systems crashing.  After investigation, it was found that if the
> system was located above a certain elevation, gamma rays would zap
memory
> bits between refresh cycles, causing the system to go down.
>
> The  fix was a PTF that caused memory refresh to occur more frequently

I recall that PTF.  Used to have the cover letter, but lost it over the
years.  The cover letter listed cosmic rays as the cause of the problem.
It
was a hyper PTF that was released in 1989 or 1990.

Stan