Server memory problems

[Andy Young]

Hi Peter,

I will check the BIOS firmware. I haven't tried that yet.

I'm running FreeBSD 9-RELEASE-p3. Yes it is AMD64.

I ran memtest on the first 32 gb or memory where the machine was initially
stable. Once I put over 64 GB in, I can't get the machine to stay up for
long enough to even try.

I'll try the verbose boot idea too.

Thanks!

On Mon, Jul 16, 2012 at 8:49 PM, Peter Jeremy <peter at rulingia.com> wrote:

> On 2012-Jul-16 19:45:18 -0400, Andy Young <ayoung at mosaicarchive.com>
> wrote:
> >I am having trouble with one of our servers and I'm not sure what to try
> >next. It has a Supermicro H8DGi-F motherboard with two 16-core AMD
> >processors and two memory banks, one for each processor. When I originally
> >built it, I only had one processor and 40 GB of ram. Everything worked
> >awesome. I recently upgraded it, adding another processor and another 40
> GB
> >of ram. It was incredibly unstable and constantly rebooted within minute
> or
> >two of uptime, sometimes it wouldn't even boot all the way before crashing
> >and rebooting again.
> ...
> >other ideas? Again, its perfectly stable with two processors and 64 GB of
> >memory but goes nuts when I more.
>
> Have you checked the motherboard notes to ensure that your configuration
> is supported?  Is the BIOS up to date?
>
> What version of FreeBSD is this?  And I presume it's amd64 rather than
> i386+PAE.
>
> Have you tried running memtest86 or memtest86+?  (You might like to
> run both because ISTR only the former handles SMP).
>
> Can you capture the output from a verbose boot with all the memory
> installed?  The SMAP and/or physical memory layout might offer a
> clue as to what is going wrong.
>
> --
> Peter Jeremy
>



-- 
Andrew Young
Mosaic Storage Systems, Inc
http://www.mosaicarchive.com/

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