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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Dear All<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I’d love to know if any Server or Storage Vendors have any meantime to failure reports based on exposure to different fire suppression systems, very interesting Read / Topic !!!<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Kindest Regards<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif";color:black'>James Braunegg<br></span></b><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>P:</span></b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> 1300 769 972 | <b>M:</b> 0488 997 207 | <b>D:</b> (03) 9751 7616</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>E:</span></b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> </span><span style='color:black'><a href="mailto:james.braunegg@micron21.com"><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>james.braunegg@micron21.com</span></a></span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> | <b>ABN:</b> 12 109 977 666 <br><b>W:</b> </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><a href="http://www.micron21.com/ip-transit"><span style='color:black'>www.micron21.com/ip-transit</span></a></span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> <b>T:</b> @micron21<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><br><img border=0 width=250 height=39 id="Picture_x0020_4" src="cid:image001.jpg@01CF10AD.660BF500" alt="Description: Description: Description: Description: M21.jpg"><br></span><span lang=EN-AU style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>This message is intended for the addressee named above. It may contain privileged or confidential information. If you are not the intended recipient of this message you must not use, copy, distribute or disclose it to anyone other than the addressee. If you have received this message in error please return the message to the sender by replying to it and then delete the message from your computer.</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: AusNOG [mailto:ausnog-bounces@lists.ausnog.net] On Behalf Of John Edwards<br>Sent: Monday, January 13, 2014 10:06 PM<br>To: ausnog@lists.ausnog.net<br>Subject: Re: [AusNOG] Global switch Level 4 Hard disk's</p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>On 13 Jan 2014, at 2:00 pm, Brad Gould <bradley@internode.com.au> wrote:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>> Sudden pressure increase or temperature drop with a gas dump?<o:p></o:p></p><p class=MsoPlainText>> <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I’m with Brad,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Gas expansion is an endothermic process. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>The temperature will drop significantly - more than you could effect with a block of ice. In a data centre, the air temp will be back to normal in one cycle, so humans may not notice the difference.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Disks are spinning at 10K rpm, operating at 55 degrees. It’s not surprising that they would fail with a sudden drop in temperature. 3.5” SATA drives are going to be hit harder than 2.5” SAS drives, simply because they are bigger and will contract further.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Pressure increase on a gas drop will be negligible, and most hard drives are effectively sealed anyway.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Someone hit a hot hard drive performing a transfer with a CO2 fire extinguisher, and let us know the result :)<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>John<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>_______________________________________________<o:p></o:p></p><p class=MsoPlainText>AusNOG mailing list<o:p></o:p></p><p class=MsoPlainText>AusNOG@lists.ausnog.net<o:p></o:p></p><p class=MsoPlainText>http://lists.ausnog.net/mailman/listinfo/ausnog<o:p></o:p></p></div></body></html>