Date: Thu, 24 Jul 2008 11:16:48 -0700 From: Chuck Swiger <cswiger@mac.com> To: John Sullivan <john@basicnets.co.uk> Cc: FreeBSD Stable List <freebsd-stable@freebsd.org> Subject: Re: Fresh 7.0 Install: Fatal Trap 12 panic when put under load Message-ID: <B4E29257-B805-4597-9024-E042F34243D1@mac.com> In-Reply-To: <A403B8D27BE048E79A94B09C0C520854@emea.hubersuhner.net> References: <854CADB9D95147CAB10BC35887A8E5DC@emea.hubersuhner.net> <20080716031640.7DC744500E@ptavv.es.net> <A6F1ACCEE35A4BC49FC9DFA561ED1131@emea.hubersuhner.net> <62b856460807160743v3fce951eg1b2bd9e50a35ba1d@mail.gmail.com> <BF6724CD748744908D602889CCF119F1@emea.hubersuhner.net> <487E0D1B.2060902@FreeBSD.org> <20080716203900.5jt4qce17gg0og0o@mail.basicnets.co.uk> <A403B8D27BE048E79A94B09C0C520854@emea.hubersuhner.net>
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On Jul 24, 2008, at 9:15 AM, John Sullivan wrote: > Right, after trying for a number of days the system still just hung > without letting me get either a dump or to interactively debug > in the failed state, I reverted back to the Generic kernel, removed > half the memory (2 of the 4 1GB sticks) and the system became > stable. I inserted 1 of the 2 removed sticks and all was fine. I > swapped that stick with the remaining stick and all was fine. I > put them both back in and I started to see the crashes again - the > first of which, gave me this dump --> You might want to double-check the detailed documentation about your motherboard. There are a fair number of consumer-grade motherboards that can't reliably handle 4 double-sided DIMMs at full speed. Some of them require you to downgrade the memory clock from, say, PC3200 (aka 200MHz DDR) down to PC2700 speed (aka 166MHz DDR); others may work, but only if you install the more expensive buffered type of RAM (which also tend to include ECC) rather than generic unbuffered RAM. Regards, -- -Chuck
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