From: Ben Le (ble@pcc.edu)
Date: Mon Aug 01 2005 - 11:24:57 EDT
Hi List,
Bill nailed this issue. What I am looking for is " high temperature breaker
that shuts off ALL power to everything in the room". Does anyone know where
to find this device?
Ben
>Date: Sat, 30 Jul 2005 20:58:05 -0400
>From: Bill Hassell <bill@billhassell.com>
>Subject: RE: [HPADM] Data Center Temperature Control Device
>To: 'Ben Le' <ble@pcc.edu>
>X-Mailer: Microsoft Outlook, Build 10.0.6626
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>Original-recipient: rfc822;ble@mailsp.pcc.edu
>
>As you have seen, the AC is a critical part of your data center.
>The damage it's failure has caused will be enormous. There will
>be total failures which are easy to spot but disks, computers,
>network devices, tape drives, etc, that seem to work have been
>permanently damaged and will constantly have unreliable and
>intermittent errors, sometimes undetectable until the data is
>checked.
>
>You DO NOT start by adding fancy pager message systems and
>computer-based notifications. Depending on the size of your heat
>load and the room size, the 138deg level might be reached in just
>a few minutes, far too short a time for anyone to react. So the very
>first item in the computer room is a high temperature breaker that
>shuts off ALL power to everything in the room. Period. No fancy
>signaling to the computers to shutdown, just pull the plug with
>a simple mechanical switch. That should be installed right now.
>These breakers are quite inexpensive when compared with loss
>that you've experienced. You want the simplest possible solution
>as your last resort. Set the breaker to about 100-110 deg. That
>way, a momentary burst of warm air won't dump power.
>
>Then you look at fancy monitoring systems. But before you do
>that, make absolutely sure that partial loss of power to your AC
>systems may also cause a power failure to your phone and data
>lines or your networking equipment. You need to trace all the
>circuits and then do some what-if planning. An automated
>system will just sit there trying to page you but because some
>component along the network (phones, DSL, etc) also went
>out, there is no message to the outside world--exactly the
>reason you need a mechanical breaker as the final backup.
>
>As far as automated sensors, there are several companies
>that make sensors for the LAN, for serial port connections,
>and of course the simplest: a contact closure. Here's something
>you probably did not think of: your security alarm system. Most
>useful systems have lots of contact closure inputs and by tying
>several temp sensors into the alarm system, your monitoring
>company can provide notification by actually calling a list of people
>until someone responds. And just the same as computer-based
>sensors and pager/email notices, make sure the alarm system
>will run during a powerfailure.
>
>--
>Bill Hassell
>
>-----Original Message-----
>From: hpux-admin-owner@DutchWorks.nl [mailto:hpux-admin-owner@DutchWorks.nl]
>On Behalf Of Ben Le
>Sent: Friday, July 29, 2005 12:35 PM
>To: hpux-admin@DutchWorks.nl
>Subject: [HPADM] Data Center Temperature Control Device
>
>
>Hi List,
>
>The story is, on one Sunday, our both ACs in the data center died. The data
>center temperature got to 138F until someone discovered.
>I am looking for a temperature control device that will execute the
>following conditions when the room get to 85F.
>- Send Email message.
>- Page the Engineer.
>- Shut off the main UPS power that feeds all the servers. That's fine. I
>rather cold power shutdown the servers instead to let them melt.
>
>Does any one have any recommendations or references. Thanks.
>
>Ben
>
>
>__________________________________________
>Benjamin Le
>Sr. Systems Administrator
>Information Technology Services
>Portland Community College
>Voice:(503)-977-4736 Fax:(503)-977-8124
>Mailto:ble@pcc.edu <mailto:ble@pcc.edu%A0%A0%A0%A0> http://www.pcc.edu
><http://www.pcc.edu/>
>
__________________________________________
Benjamin Le
Sr. Systems Administrator
Information Technology Services
Portland Community College
Voice:(503)-977-4736 Fax:(503)-977-8124
Mailto:ble@pcc.edu http://www.pcc.edu
--
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