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Re: Diagnosing an unstable Qube2

Le 29 oct. 2012 à 13:12, Andy Ruhl a écrit :

> On Mon, Oct 29, 2012 at 12:41 AM, Rémi Zara <remi_zara%mac.com@localhost> 
> wrote:
>> Hi,
>> After some years running quite well, my Qube2 (NetBSD 5.1) started to lock 
>> up after a few days, with the serial console unresponsive.
>> Usage is regular postgresql building and testing, which is quite processor 
>> and memory intensive, backup via rsync.
>> I changed the power supply, but that did not solve the problem.
>> So I upgraded to NetBSD 6.0, and the machine is now really unstable:
>> lots of core dumps until the machine is unusable, tar telling that headers 
>> are invalid, then succeeding on the same file,
>> then errors like this:
>> sendmail: panic: myfree: corrupt or unallocated memory block
>> [1]   Done                    /bin/sh /etc/dai... |
>>     Done                    tee /var/log/dai... |
>>     Abort trap (core dumped) sendmail -t
>> How do I go about diagnosing what is the problem ?
>> Are there memory tests, disk tests that I could run ?
>> Thanks for your help, I would be sad to have to decommission this little 
>> machine :-)
>> Rémi Zara
> This seems very familiar to me, but I searched and couldn't find what
> I was looking for. I seem to remember doing checksums on the same file
> repeatedly and getting different results.
> I know there were some issues related to disconnecting the fan, and
> the theory was that the fan added some stability to the power supply.
> What you are describing could be hardware instability, but if it's
> really related to upgrading to version 6 then maybe not. It is
> probably a good idea to take the machine apart and clean it, and
> re-seat the riser card and memory if you haven't done it in a while.


The machine would lock up before upgrading to 6.0. The upgrade just made the 
instability so much more pronounced.
I've ordered new RAM, and will clean the machine when I install it...


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