RE: Does a System i require a proprietary rack?

Re: burning through power supplies - I wonder what you all think of the "Zinc Whisker" theory (http://nepp.nasa.gov/WHISKER/reference/tech_papers/Brusse2003-Zinc-Whisker-Awareness.pdf) and if anything new has come of it. We have had a lot of power supply failures in our data center (25+ yr old raised floor), mostly after some cleanup work or other disturbance has happened...

- Charlie

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Friday, July 24, 2009 9:16 AM
To: Midrange Systems Technical Discussion
Subject: RE: Does a System i require a proprietary rack?

We don't have the budget for the second UPS. At least at our primary
site. We do have a standby generator that is tested weekly. Our backup
site will have the second UPS (due to plant consolidation).

When replacing our raised floor we burned through something like 6 power
supplies in various units. I was amazed when the IBM support guy asked me
if I was replacing our raised floor. Turns out the only other time he's
ever seen anything like this was the same scenario. Must be some really
fine dust down there. I'd recommend some top line filters on those vacuum
cleaners and not the basic that comes with your average "Shop Vac" as used
by the contractor (a former employee we jacked over really bad shortly
beforehand).

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From:
"Burns, Bryan" <Bryan_Burns@xxxxxxxxxxxx>
To:
"Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date:
07/24/2009 09:07 AM
Subject:
RE: Does a System i require a proprietary rack?
Sent by:
midrange-l-bounces@xxxxxxxxxxxx



So Rob, it sounds like you have a lot of redundancy for power. I assume
then, that you've never had a failure in power for production boxes? Just
curious.

Bryan Burns
iSeries Specialist
ECHO, Incorporated
Lake Zurich, Illinois

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [
mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Friday, July 24, 2009 7:41 AM
To: Midrange Systems Technical Discussion
Subject: Re: Does a System i require a proprietary rack?

We went cheap on PDU's. After all "MOST" IBM equipment supports dual.
Meaning it works on either 110 or 220. We have found some of the newer
ones have went to 220 only - which really floored the CE. We have spent
the money on IBM PDU's. And we always match PDU's. Meaning that if you
have dual power supply equipment it really doesn't make sense to plug them

both into the same PDU. And each PDU should be on a separate breaker. And

if you have the budget then put the PDU's on different UPS and power
source.
We didn't purchase the power manager PDU's with any fancy interfaces - not

that I've looked that closely.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





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