[c-nsp] Multiple power supply failures. Advise needed

[Geoffrey Pendery]

Another odd-ball thing to look for, which has plagued us in a few
locations, is zinc whiskers.
You mention physically moving to a new colo provider, and that your
power is supposed to be clean...
We've had repeated power supply failures because of zinc whiskers in a
few of our sites.

Check out http://en.wikipedia.org/wiki/Zinc_whiskers and Google for
"zinc whiskers".
Probably not your problem, but it's one more weird thing to check.


-Geoff


On Tue, Sep 1, 2009 at 11:17 AM, Michael Ulitskiy<mulitskiy at acedsl.com> wrote:
> Hello,
>
> After a little pause it started happening again and we lost 2 more power supplies
> (this time in servers) during last week.
> Can anybody advice on a good organization that could do independent power analysis
> in New York, NY?
> Thank you,
>
> Michael
>
>
> On Friday 14 August 2009 09:56:00 pm you wrote:
>> Michael Ulitskiy wrote:
>> > Hello,
>> >
>> > We have a very strange problem. We have recently changed colo-space provider and since that
>> > we had 4 power supply failures in all kind of cisco equipment within 2 month period.
>> > According to colo provider we're receiving "clean" power backed up by UPSes and generator.
>> > We're currently have 4 20-amps circuits with APC managed PDUs in them and power supply failures
>> > happened in 3 of them, so I can't blame it to one specific circuit or PDU.
>> > There was no environmental warning in the logs of any cisco devices.
>> > I'm completely out of the clues. I'm going to bring it up with our colo-space provider, but I'm afraid
>> > they'll need some proof or pointers.
>> > Does anybody have any ideas what could be causing this and how I can monitor the specific conditions?
>> > Thanks,
>> >
>>
>> If you're having power supplies cook off like that for no apparent
>> reason, I'd get an independent analysis of the power being fed to my
>> outlets.
>>
>> ~Seth
>>
>
>
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