[LinuxUsers] what caused this crash?

[David Kaiser]

Hey Todd,

I've never heard of power supplies degrading. That is pretty
interesting.  I may have to try that if I can ever suspect that a power
supply is causing interference noise, etc.

how would you measure if a power supply is doing this?  Can you use a
scope and look at the supply voltage, etc. ?  Or do you just replace it
and if it goes away, then you fixed it?

DK

On 7/20/2009, "Todd Lyons" <tlyons at ivenue.com> wrote:

>On Sat, Jul 18, 2009 at 8:41 PM, Jeff Lasman<jplists at nobaloney.net> wrote:
>>
>>> If you cant do a memtest, then you could just change the ram to
>>> something better and/or not bad.  In some cases, ie) kingston ram,
>>> you might need to up the voltage.  Just a guess.
>>>
>>> What kind of ram are you running on this server?
>>
>> Unfortunately I don't know and as far as I know I'd have to shut down
>> the server to find out.
>>
>> Here's what I do know... we buy the servers populated with ram, by
>> ServersDirect, a rather well-known and respected provider.  When we
>> need more memory, we buy it from them as well.
>>
>> This is the first time we've ever had a problem that could relate to
>> memory, in about eight years of using these servers.
>
>Just some off the way observations from someone who has a few old
>VALinux and HP boxes still in use (440BX mobo).
>
>Are these particular servers 5+ years old?  One thing to consider is
>that the power supply could be degrading which causes more noise (not
>regulated as well) and putting a new one in could make the instability
>go away.
>
>Any buildup of dust?  That's insulation, making it harder for heat to
>be dispersed.  Or in general, poor airflow in that area.  If it's in
>your colo though, I really doubt it, and I'd be very concerned if
>there was dust buildup in the computer(s).
>-- 
>Regards...      Todd
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