[AusNOG] Global switch Level 4 Hard disk's
Ben Buxton
bb.ausnog at bb.cactii.net
Mon Jan 13 17:57:00 EST 2014
The volume discharged is calculated such that residual O2 remains (about
10% v/v). The CO2 is intended to induce a physiological reaction which
causes you to breath heavier to compensate.
There's probably a page describing the reasoning behind the numbers
(wikipedia maybe?)
BB
On Mon, Jan 13, 2014 at 5:53 PM, Tony de Francesco <tonyd at pue.com.au> wrote:
> And last time I drew a breathe I could not live on a mixture of 52%
> nitrogen, 40% argon and 8% carbon dioxide.
>
> Regards
>
> Tony de Francesco
> Technical Director
> P.U.E. Pty Ltd
> Mob: +61 (0) 457 701 179
> Email: tonyd at pue.com.au
> On 13/01/2014 5:45 PM, "Tony de Francesco" <tonyd at pue.com.au> wrote:
>
>> Yes but Inergen is not used in large DCs because of the volume required.
>>
>> The European system is a hypoxic system at low pressure. Very different
>> to dumping a whole bunch of gas through high pressure nozzles.
>>
>> Regards
>>
>> Tony de Francesco
>> Technical Director
>> P.U.E. Pty Ltd
>> Mob: +61 (0) 457 701 179
>> Email: tonyd at pue.com.au
>> On 13/01/2014 5:33 PM, "Ben Buxton" <bb.ausnog at bb.cactii.net> wrote:
>>
>>>
>>> Inergen is an inert system. It's just Nitrogen, Argon and CO2, perfectly
>>> safe for humans to breath the resulting atmosphere post-discharge, as it
>>> still contains enough oxygen to support life but not fire.
>>>
>>> BB
>>>
>>>
>>> On Mon, Jan 13, 2014 at 5:22 PM, Tony de Francesco <tonyd at pue.com.au>wrote:
>>>
>>>> Not all data centres use fire supression gases like FM200 or Inergen,
>>>> although the Australian DC market seems hooked on these gas solutions.
>>>>
>>>> Such systems are actually banned throughout much of Europe where
>>>> instead they deploy an oxygen reduction system, which operates by filling
>>>> the room with an inert gas to reduce the oxygen levels in order to stop a
>>>> fire but still support human life (with no effect on electrical equipment!).
>>>>
>>>> Regards
>>>>
>>>> Tony de Francesco
>>>> Technical Director
>>>> P.U.E. Pty Ltd
>>>> On 13/01/2014 4:22 PM, "Jared Hirst" <
>>>> jared.hirst at serversaustralia.com.au> wrote:
>>>>
>>>>> Must be a very good reason, they have 100+ DC's all the same :(
>>>>>
>>>>> -----Original Message-----
>>>>> From: Nathan Brookfield [mailto:Nathan.Brookfield at simtronic.com.au]
>>>>> Sent: Monday, January 13, 2014 4:21 PM
>>>>> To: Jared Hirst; Joseph Goldman; ausnog at lists.ausnog.net
>>>>> Subject: RE: [AusNOG] Global switch Level 4 Hard disk's
>>>>>
>>>>> Yeah so it just means when/if a fire starts your equipment is
>>>>> completely
>>>>> SCREWED instead of just some blown drives. I wouldn't say this is an
>>>>> advantage at all.
>>>>>
>>>>> Kindest Regards,
>>>>> Nathan Brookfield (VK2NAB)
>>>>>
>>>>> Chief Executive Officer
>>>>> Simtronic Technologies Pty Ltd
>>>>>
>>>>> Local: (02) 4749 4949 | Fax: (02) 4749 4950 | Direct: (02) 4749 4951
>>>>> Web: http://www.simtronic.com.au | E-mail:
>>>>> nathan.brookfield at simtronic.com.au
>>>>>
>>>>> -----Original Message-----
>>>>> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of
>>>>> Jared
>>>>> Hirst
>>>>> Sent: Monday, 13 January 2014 4:17 PM
>>>>> To: Joseph Goldman; ausnog at lists.ausnog.net
>>>>> Subject: Re: [AusNOG] Global switch Level 4 Hard disk's
>>>>>
>>>>> " but the generality of the fault means it could happen in any major
>>>>> data
>>>>> center really."
>>>>>
>>>>> Wouldn't happen in Equinix... They use Dry Pipe and manual fire
>>>>> supression
>>>>> to alleviate any 'accidental' systems going off :)
>>>>>
>>>>> I would class that as a pretty major Data Centre.
>>>>>
>>>>> -----Original Message-----
>>>>> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of
>>>>> Joseph
>>>>> Goldman
>>>>> Sent: Monday, January 13, 2014 4:15 PM
>>>>> To: ausnog at lists.ausnog.net
>>>>> Subject: Re: [AusNOG] Global switch Level 4 Hard disk's
>>>>>
>>>>> It's not quite so funny when you realise some people may have hours -
>>>>> or
>>>>> days - worth of headache's ahead of them restoring back to production.
>>>>>
>>>>> It is an odd circumstance, and one that I would not have thought of
>>>>> personally in risk mitigation (beyond accounting for fire anyway). Are
>>>>> there drives rated against this kind of 'shock'? Obviously one should
>>>>> have
>>>>> Disaster Recovery in place, as the gas suppression going off may
>>>>> indicate
>>>>> your servers being doused in fire and unusable anyway, but when one can
>>>>> avoid DR one would, and I'd rather not break on a false positive.
>>>>>
>>>>> Luckily I don't use Global Switch, but the generality of the fault
>>>>> means
>>>>> it could happen in any major data center really.
>>>>>
>>>>> On 13/01/14 16:08, Tim March wrote:
>>>>> > Lol. Awesome.
>>>>> >
>>>>> > So, does the incident report look something like;
>>>>> >
>>>>> > 12:01 "CCTV records HVAC maintenance punter smoking cigarette"
>>>>> > 12:03 "Suppression system dumps 987165128973465891723412352643345^2
>>>>> > liters of gas in to machine room in ~ 0.000000001675 seconds"
>>>>> > 12:03 "Sonic boom recorded at BOM monitoring station 50km from
>>>>> facility"
>>>>> > 12:04 *picture of engineer crying / HDD parts strewn all over floor*
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> > T.
>>>>> >
>>>>> > On 13/01/14 3:22 PM, Pinkerton, Eric (AU Sydney) wrote:
>>>>> >> It's not unheard of, it's to do with the noise created when the fire
>>>>> suppression system deploys...
>>>>> >>
>>>>> >> http://www.bvfa.de/pdf-download/en-3/
>>>>> >>
>>>>> >>
>>>>> http://www.buildingtechnologies.siemens.com/bt/global/en/firesafety/e
>>>>> >>
>>>>> xtinguishing/about-sinorix/latest-technical-findings/Documents/White_
>>>>> >>
>>>>> Paper_Potential%20damage%20to%20hard%20disk%20drives%20during%20disch
>>>>> >> arges_en_September2012.pdf
>>>>> >>
>>>>> >> There is even a market for nozzles on fire suppression systems that
>>>>> lowers the sound in order to prevent this happening..
>>>>> >>
>>>>> >> See the WWW.FIKE.COM PROINERT(r) HUSH NOZZLES
>>>>> >>
>>>>> >> -----Original Message-----
>>>>> >> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of
>>>>> >> Matt Perkins
>>>>> >> Sent: Monday, 13 January 2014 2:26 PM
>>>>> >> To: ausnog at lists.ausnog.net
>>>>> >> Subject: [AusNOG] Global switch Level 4 Hard disk's
>>>>> >>
>>>>> >> Hi All,
>>>>> >> I have quite a few people today with hard drives fail in suites
>>>>> on
>>>>> level 4 at global switch. GS tell us the Gas was dropped in response
>>>>> to
>>>>> some smoke from some plant. Not sure how inergen would effect hard
>>>>> drives
>>>>> but there are many people wondering around on level 4 looking like
>>>>> there
>>>>> dog just died.
>>>>> >>
>>>>> >> Anybody have any more info.
>>>>> >>
>>>>> >> Matt
>>>>> >>
>>>>> >> --
>>>>> >> /* Matt Perkins
>>>>> >> Direct 1300 137 379 Spectrum Networks Ptd. Ltd.
>>>>> >> Office 1300 133 299 matt at spectrum.com.au
>>>>> >> Fax 1300 133 255 Level 6, 350 George Street Sydney
>>>>> 2000
>>>>> >> SIP 1300137379 at sip.spectrum.com.au
>>>>> >> PGP/GNUPG Public Key can be found at http://pgp.mit.edu*/
>>>>> >>
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>>>>>
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>>>>
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