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

[Michael Ulitskiy]

It's different kind of Cisco power supplies (WS-CAC-2500W, WS-CAC-1300W, AS54HPX-AC-RPS)
plus servers power supplies (PWS-0055)

Michael

On Wednesday 02 September 2009 12:12:33 pm you wrote:
> You're correct, depending on the hardware you're using your supplies could 
> be sucking fibers right n to their inner workings.  I don't recall if you 
> mentioned so sorry if this is covering old ground but is it only Cisco gear 
> you're having issues with or is it random across platforms / hardware types?
> 
> ----- Original Message ----- 
> From: "Michael Ulitskiy" <mulitskiy at acedsl.com>
> To: "Randy McAnally" <rsm at fast-serv.com>
> Cc: <cisco-nsp at puck.nether.net>
> Sent: Wednesday, September 02, 2009 8:08 AM
> Subject: Re: [c-nsp] Multiple power supply failures. Advise needed
> 
> 
> > What about the fact that most (if not all) power supplies have independent 
> > sucking fan
> > and that power supply air flow is separate from the system board flow.
> >
> > Plus all system board I saw are covered with some insulating coating.
> > I've never pulled apart a modern power supply. I'd expect them to have 
> > something like that too, but who knows?
> > Plus since PSU is the only part that's dealing with high voltages I expect 
> > it to be more sensitive
> > to momentary shorts. Am I wrong?
> >
> > I'm expecting report for provider ordered unintrusive power monitoring.
> > I'm almost positive they won't find anything, though.
> > I'm still looking for advice on independent power analysis source in New 
> > York, NY if anyone has this kind of experience.
> > Thanks,
> >
> > Michael
> >
> > On Wednesday 02 September 2009 10:29:07 am Randy McAnally wrote:
> >> Plain old dust wouldn't be so picky...it has to be ingested past the 
> >> system
> >> board before it hits the power supply in most cases.  System boards are 
> >> WAY
> >> more sensitive to this kind of thing.
> >>
> >> The fact you have ONLY PSU's failing still makes me think you have power 
> >> issues.
> >>
> >> --
> >> Randy
> >> www.FastServ.com
> >>
> >> ---------- Original Message -----------
> >> From: Michael Ulitskiy <mulitskiy at acedsl.com>
> >> To: "Randy McAnally" <rsm at fast-serv.com>
> >> Cc: "Scott Granados" <gsgranados at comcast.net>, "Seth Mattinen"
> >> <sethm at rollernet.us>, cisco-nsp at puck.nether.net
> >> Sent: Tue, 1 Sep 2009 23:21:23 -0400
> >> Subject: Re: [c-nsp] Multiple power supply failures. Advise needed
> >>
> >> > This is my main suspect now. They are doing work in the facility.
> >> > Not heavy construction, but they do install cages and cabinets for
> >> > new tenants and they're definitely using tools that  produce metal 
> >> > dust.
> >> > My theory is that because of we've been the 1st customer who moved
> >> > into that facility we've been collecting that metal dust for longest
> >> > and so we're having a lot of problems with our equipment. To my
> >> > knowledge none of our neighbors are having the same problem, but
> >> > none of them have been in the place long enough. So the question
> >> > remains: is there any way to fight it/protect from it except from
> >> > going through the huge-huge-huge headache of undertaking another move?
> >> >
> >> > Michael
> >> >
> >> > On Tuesday 01 September 2009 08:48:38 pm Randy McAnally wrote:
> >> > > He mentioned he was one of the first customers in the colo so
> >> > > this might be a possibility
> >> > >
> >> > > --
> >> > > Randy
> >> > >
> >> > > ---------- Original Message -----------
> >> > > From: "Scott Granados" <gsgranados at comcast.net>
> >> > > To: "Seth Mattinen" <sethm at rollernet.us>, "Michael Ulitskiy"
> >> > > <mulitskiy at acedsl.com>
> >> > > Cc: cisco-nsp at puck.nether.net
> >> > > Sent: Tue, 1 Sep 2009 17:35:34 -0700
> >> > > Subject: Re: [c-nsp] Multiple power supply failures. Advise needed
> >> > >
> >> > > > Also make sure that the provider isn't doing work in the facility.
> >> > > >  I'll never forget going to an L3 datacenter and arriving to find
> >> > > > workmen in the overhead grinding away and dropping dust and who
> >> > > > knows what else in to all the racks below including a rack of Netra
> >> > > > T1's that promptly sucked in the dust and kicked out power
> >> > > > supplies.;)  It was definitely metal shavings because they were
> >> > > > using a grinding type tool up in  the over head frames.
> >> > > >
> >> > >
> >> > >
> >> ------- End of Original Message -------
> >>
> >>
> >
> >
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/ 
> 
>