Re: How long does a PWRDWNSYS restart(*no) actually take?

And then there was the customer who had a very nice generator alMOST connected perfectly. The feed to the generator was perfect and the power to the DC was perfect. ONE switch set wrong, the generator was monitoring the wrong leg of the 3-phase power. The DC only got one phase but the generator was monitoring a different phase. When the phase the DC utilizes went away the generator didn't see any issue and thus never started. Oops.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 8/1/2017 10:02 AM, Mark Murphy/STAR BASE Consulting Inc. wrote:

I remember when they first tested the generator on the old data center. There was some sort of short in the Generator distribution panel, and when it went live, took the entire data center down. That was production!

Mark Murphy
Atlas Data Systems
mmurphy@xxxxxxxxxxxxxxx


-----Charles Wilt <charles.wilt@xxxxxxxxx> wrote: -----
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
From: Charles Wilt <charles.wilt@xxxxxxxxx>
Date: 07/31/2017 04:42PM
Subject: Re: How long does a PWRDWNSYS restart(*no) actually take?


Place I used to work built a new data center...

dual generators
dual UPS's

And these UPS's were rooms sized, battery stack about 20ft long 10ft wide,
10ft tall...

Problem was both battery stacks were in the same room 50ft x 15ft room...

A fire on one stack took down both...oopps!

Luckily, we hadn't actually started moving production machines into it.

But I don't believe they could have or did redesign it at that point.
Unless maybe they added an actual firewall between the stacks.


Charles


On Mon, Jul 31, 2017 at 2:29 PM, Rob Berendt <rob@xxxxxxxxx> wrote:

We did have an employee who flipped the wrong thing on the UPS and killed
the machine room. Like, which end of the knob was the pointy end and
which was just a handle kind of thing. He quickly left to do something at
one of our other cities.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 07/31/2017 04:27 PM
Subject: RE: How long does a PWRDWNSYS restart(*no) actually take?
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



On first glance, that sounds like a good idea (although not straight into
dirty power).

If a power supply fails, you're still good.
If utility power fails, you're still good.
If UPS fails, you're still good.**

** If both power supplies go into the UPS, you're sunk here.



-----Original Message-----
From: DrFranken [mailto:midrange@xxxxxxxxxxxx]
Sent: Monday, July 31, 2017 2:37 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>;
Gerald Magnuson <gmagqcy.midrange@xxxxxxxxx>
Subject: Re: How long does a PWRDWNSYS restart(*no) actually take?

> We do have redundant power supplies, and I have them honed to 1) >
straight Utility power... 2) UPS (after the utility power / > Generator
switch)....

Curious to the logic of plugging one into the wall and one into the UPS?

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.


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