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<body><div>I can confirm a similar incident not in Sydney. It was later confirmed that the noise was the contributing factor to the disk death.<br></div>
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<div>James<br></div>
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<div>On Fri, 14 Dec 2018, at 07:32, Robert Hudson wrote:<br></div>
<blockquote type="cite"><div>Not sure. Some of the wordage indicates it may be a separate incident (albeit at a similar time)...<br></div>
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<div defang_data-gmailquote="yes"><div dir="ltr">On Fri, 14 Dec. 2018, 7:50 am Simon Sharwood <<a href="mailto:simon@jargonmaster.com">simon@jargonmaster.com</a> wrote:<br></div>
<blockquote defang_data-gmailquote="yes" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-color:rgb(204, 204, 204);border-left-style:solid;border-left-width:1px;padding-left:1ex;"><div><div style="direction:ltr;margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;font-family:sans-serif;font-size:11pt;color:black;"><a href="https://www.theregister.co.uk/AMP/2014/02/04/loud_data_centre_gas_release_sounds_harm_disks/">https://www.theregister.co.uk/AMP/2014/02/04/loud_data_centre_gas_release_sounds_harm_disks/</a> was it this one Robert?<br></div>
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<div dir="ltr"><div><span class="colour" style="color:rgb(0, 0, 0)"><span class="font" style="font-family:Calibri, " sans-serif""><span class="size" style="font-size:11pt"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net">ausnog-bounces@lists.ausnog.net</a>> on behalf of Robert Hudson <<a href="mailto:hudrob@gmail.com">hudrob@gmail.com</a>><br> <b>Sent:</b> Friday, December 14, 2018 7:45:06 AM<br> <b>To:</b> Bevan Slattery<br> <b>Cc:</b> <a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><br> <b>Subject:</b> Re: [AusNOG] [AUSNog] : Re Data Centre Fire Suppression Safety</span></span></span> </div>
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<div><div>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.<br></div>
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<div defang_data-gmailquote="yes"><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 defang_data-gmailquote="yes" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-color:rgb(204, 204, 204);border-left-style:solid;border-left-width:1px;padding-left:1ex;"><div><div style="direction:ltr;"><div style="direction:ltr;">It’s pretty much all been said.<br></div>
<div style="direction:ltr;"><br></div>
<div style="direction:ltr;">Halon (long gone). Reaction sucks oxygen out of air.<br></div>
<div style="direction:ltr;">FM200 (safe but being phased out). Heard it can leave a residue despite the brochure saying not.<br></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.<br></div>
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<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"> http://www.firepass.com/oxygen-reduction-fire</a> <br></div>
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<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.<br></div>
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<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.<br></div>
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<div style="direction:ltr;">Cheers<br></div>
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<div style="direction:ltr;">B<br></div>
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<div><div><hr style="display:inline-block;width:98%;"><br></div>
<div><div><span class="colour" style="color:rgb(0, 0, 0)"><span class="font" style="font-family:Calibri, " sans-serif""><span class="size" style="font-size:11pt"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net">ausnog-bounces@lists.ausnog.net</a>>
on behalf of Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com">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"> AusNOG@lists.ausnog.net</a><br> <b>Subject:</b> [AusNOG] [AUSNog] : Re Data Centre Fire Suppression Safety </span></span></span></div>
<div> <br></div>
<div><span class="colour" style="color:rgb(0, 0, 0)"><span class="font" style="font-family:Calibri, " sans-serif""><span class="size" style="font-size:11pt"></span></span></span><br></div>
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<div dir="ltr"><div dir="ltr"><div>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">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></div>
<div> <br></div>
<div> Kind regards<br></div>
<div> <br></div>
<div> Paul Wilkins<br></div>
<div> <br></div>
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