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Date:      Tue, 03 Sep 1996 09:00:43 -0400
From:      Gary Chrysler <tcg@ime.net>
To:        Bill/Carolyn Pechter <pechter@shell.monmouth.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: anyone have a memory test?
Message-ID:  <322C2BFA.228F@ime.net>
References:  <199609022017.QAA21812@shell.monmouth.com>

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Bill/Carolyn Pechter wrote:
> 
> Sorry for the repost -- if you've seen this twice...  I bounced my last
> due to an aliases screw up -- Bill
> 
> I've been fighting memory problems ever since I pulled out my motherboard
> and installed a new one.
> 
> Unfortunately, the new one didn't work -- so I put back the old one.
> (The simms never came off it when it was pulled  -- so I expected no problem...
> however, it's now sig-11, sig6 city.
> 
> Dos based memory tests show nothing (I've got 20 meg... my best diag
> doesn't test past 16).
> 
> FreeBSD boots, runs, and sig-11's occasionally during make world and heavy
> X stuff.  I went from 20 meg to 8mb of 1mb simms -- same problem.
> I went to 16mb of 4mb simms -- same problem.
> 
> I reseated and enabled and disabled the cache... same problem.
> 
> I swapped in a DX2/66 to try to see if the problem would show up or go away
> with a CPU reseat/replacement.  No luck.
> 
> I'm waiting for the new motherboard -- and I have new 72 pin simms for it.
> (It's en route from the company as a swap with the bad one.)
> 
> Anyone have a memory test recommendation that works short of a hardware
> memory test.   I remember FreeBSD 1.5 pulled out errors on my wife's box
> that were causing crashes under OS/2 and SIG11's under Linux.
> 
> I sure miss minicomputers with real memory controllers with memory
> address registers that latch parity errors and report the address.
> I sure miss BSD on a Vax that reported the ECC location and correction bits...
> 

You might try de-tuning your system BIOS, ie: Wait states.

-Enjoy
Gary
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