<div dir="auto">I can confirm that the sound/pressure wave from a gas discharge can, does and absolutely did destroy a lot of spinning disks in some very expensive kit (big data and database appliances) when such a system was accidently deployed in a datacentre I am familiar with.</div><br><div class="gmail_quote"><div dir="ltr">On Fri, 14 Dec. 2018, 5:02 am Bevan Slattery <<a href="mailto:bevan@slattery.net.au">bevan@slattery.net.au</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div style="direction:ltr">
<div style="direction:ltr">It’s pretty much all been said.</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">Halon (long gone). Reaction sucks oxygen out of air.</div>
<div style="direction:ltr">FM200 (safe but being phased out). Heard it can leave a residue despite the brochure saying not.</div>
<div style="direction:ltr">Inergen more common (and others like it). Fundamentally mostly nitrogen that drops oxygen below 15% and drops temperature. These are two components of a fire (heat, fuel and oxygen). People can operate comfortably below 15%
oxygen. In fact at 10% you can still function more than enough to pick up your gear and leave the room.</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">I did quite a bit of research on reduced oxygen environments (hypoxic) which is used on (Firepass etc.) <a href="http://www.firepass.com/oxygen-reduction-fire" target="_blank" rel="noreferrer">http://www.firepass.com/oxygen-reduction-fire</a> </div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">Obviously dry pipe is used a lot. The issues with gas suppression today are more around noise (and vibration) and temp drop and they relate to spinning disks and circuit boards, more than people.</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">The issues around dry pipe is, well when it goes off, it’s not very dry and water/equipment certainly doesn’t mix.</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">Cheers</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">B</div>
<div style="direction:ltr"><br>
</div>
<div class="m_-6948049452514261626ms-outlook-ios-signature"></div>
</div>
<div>
<hr style="display:inline-block;width:98%">
<div id="m_-6948049452514261626divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog-bounces@lists.ausnog.net</a>> on behalf of Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com" target="_blank" rel="noreferrer">paulwilkins369@gmail.com</a>><br>
<b>Sent:</b> Wednesday, December 12, 2018 3:53 pm<br>
<b>To:</b> <a href="mailto:AusNOG@lists.ausnog.net" target="_blank" rel="noreferrer">AusNOG@lists.ausnog.net</a><br>
<b>Subject:</b> [AusNOG] [AUSNog] : Re Data Centre Fire Suppression Safety
<div> </div>
</font></div>
<div dir="ltr">
<div dir="ltr">Every data centre has a fire suppression system. We're not used to thinking of this as a hazardous environment, but consequent to<a href="https://www.theguardian.com/world/2018/dec/12/antarctica-two-technicians-dead-mcmurdo-station-ross-island" target="_blank" rel="noreferrer">two
techs being found dead working on a fire suppression system in Antarctica</a>, I find myself wondering yet again, why there aren't more stringent controls around the fire suppression systems in data centres: viz - when you enter a data centre, how confident
can you be you're not going to be quietly asphyxiated?<br>
<br>
Kind regards<br>
<br>
Paul Wilkins<br>
<br>
</div>
</div>
</div>
</div>
_______________________________________________<br>
AusNOG mailing list<br>
<a href="mailto:AusNOG@lists.ausnog.net" target="_blank" rel="noreferrer">AusNOG@lists.ausnog.net</a><br>
<a href="http://lists.ausnog.net/mailman/listinfo/ausnog" rel="noreferrer noreferrer" target="_blank">http://lists.ausnog.net/mailman/listinfo/ausnog</a><br>
</blockquote></div>