+1 Paul, TY I did not want to feed the TROLL
Kindly, ROY ADAMS* | *P 07 3040 5010 | Web: http://www.racs.com.au/ | Wiki: https://ex.racs.com.au:444/ | eMail: mailto:[email protected] <[email protected]> Please never upgrade to the latest Windows 10 - You don’t need the hassle, and I don’t need the work. More seriously, the 6 month older Windows 10 releases are typically FAR MORE stable - a simple RACS script can fix this - just ask :) If you think it's expensive to hire a professional to do the job, wait until you hire an amateur - Red Adair. Life is a journey through a series of adventures.. Live them, love them, hate them, but never give up on your dreams, desires, and goals. Have you been good today? .ಠ_ಠ On Thu, 22 Aug 2019 at 10:18, Paul Wilkins <[email protected]> wrote: > I think this is germane to the mail list for the following reasons: > > 1 - IF there is an obvious correlation between Au resident DCs with East > West running cabinet rows and higher failure rates rather than North South > running cabinet rows, then it should be within the ability/resources of > this mail list to identify. > > Reason being, for precession purposes, Australia qualifies as Equitorial > (as opposed to Polar). The means you minimise precession with vertical > disks, where the disk axis points north. Because disks insert into disk > arrays face first, this means you minimise precession with cabinet rows > that run North/South. (ie. the cabinet rows are parallel to the disk axes). > > 2 - IF the correlation is real, then this is knowledge of value, due to > improved reliability and level of service that entails. And just as > importantly, tech time spent restoring crashed drives can be invested > elsewhere. Thirdly, it may mean you get to extend the useful life of drive > arrays, which will give capital and operational economies. > > If there's no obvious correlation, the only cost is some argument over > noise on the list. > > Kind regards > > Paul Wilkins > > On Thu, 22 Aug 2019 at 08:45, andrew khoo <[email protected]> > wrote: > >> i hate to be a “me too”. >> >> i personally believe this issue is of relevance to operators. >> >> in the australian context this is even more relevant due to potential >> costs we have to incur to keep spinning rust for our compliance >> requirements. >> >> maintaining a healthy lifecycle means potentially extending the useful >> life of storage that surely an operator cannot run without. >> >> just my 2c. >> >> (and OP’s theory might mean a migration to DCs in darwin? :) :)) >> >> >> >> On Thu, 22 Aug 2019 at 08:37, <[email protected]> wrote: >> >>> Excuse my apparent naivety, but I thought data centres were attached to >>> networks? It’s apparent that only DevOps engineers are allowed to think >>> scientifically, unlike the rest of us mere mortals. I’m sure that I’m not >>> the only one that found Paul’s theorising quite interesting…or has the >>> inherent Luddite atmosphere of stifling creative thought in this country >>> now permeated into the Technosphere…? >>> >>> >>> >>> >>> >>> >>> >>> *From:* AusNOG <[email protected]> *On Behalf Of *James >>> Hodgkinson >>> *Sent:* Wednesday, 21 August 2019 6:36 PM >>> *To:* [email protected] >>> *Subject:* Re: [AusNOG] [AUSNOG] Disk wear & Foucault Period >>> >>> >>> >>> Please stop thinking out loud, this is the quiet carriage. >>> >>> >>> >>> James >>> >>> >>> >>> On Wed, 21 Aug 2019, at 17:17, Paul Wilkins wrote: >>> >>> Another thought, which is that horizontal mounting is optimal for polar >>> regions, whereas you minimise precession at equitorial latitudes with >>> vertical mounting (but only if the axis is north aligned), which could go >>> some way to explaining the anecdotal stuff you hear about horizontal versus >>> vertical mounting. Though I've yet to hear anyone asking what's your >>> latitude before they proceed to build a data centre or installing your >>> vertical disks arrays to be north axis aligned. >>> >>> >>> >>> Kind regards >>> >>> >>> >>> Paul Wilkins >>> >>> >>> >>> On Wed, 21 Aug 2019 at 16:31, Mark Smith <[email protected]> wrote: >>> >>> How is this related to network operation? AusNOG - Australian Network >>> Operators Group. >>> >>> >>> >>> You wouldn't go to a car show to ask about motorbikes - you'd to to a >>> motorbike show, because that's where the most people interested in and >>> having the most knowledge about motorbikes would be. >>> >>> >>> >>> On Wed, 21 Aug 2019 at 15:30, Roy Adams <[email protected]> wrote: >>> >>> Paul, I would be most interested if you hear back from them. >>> >>> >>> >>> I am curious if even BackBlaze have considered your idea in the past.. >>> maybe a wake up for them and others >>> >>> >>> >>> FYI, they produce these reports each quarter - worth calendaring to pick >>> up. >>> >>> I was stunned at the 14TB Toshiba reliability... interestingly, 2 weeks >>> ago that top line read 0 failures... today it says 1 - v.strange >>> >>> >>> >>> >>> >>> Kindly, >>> >>> >>> >>> ROY ADAMS* | *P 07 3040 5010 | Web: http://www.racs.com.au/ | Wiki: >>> https://ex.racs.com.au:444/ | eMail: mailto:[email protected] >>> <[email protected]> >>> >>> Please never upgrade to the latest Windows 10 - You don’t need the >>> hassle, and I don’t need the work. >>> >>> More seriously, the 6 month older Windows 10 releases are typically FAR >>> MORE stable - a simple RACS script can fix this - just ask :) >>> If you think it's expensive to hire a professional to do the job, wait >>> until you hire an amateur - Red Adair. >>> >>> Life is a journey through a series of adventures.. Live them, love them, >>> hate them, but never give up on your dreams, desires, and goals. >>> >>> Have you been good today? .ಠ_ಠ >>> >>> >>> >>> >>> >>> On Wed, 21 Aug 2019 at 11:22, Paul Wilkins <[email protected]> >>> wrote: >>> >>> Roy, >>> >>> Those are the most comprehensive disk stats I've ever seen. >>> >>> >>> >>> So out of curiosity, I emailed Backblaze to ask if they'd noticed any >>> latitudinal effect on disk wear. Not realistically expecting a response, >>> but if they did notice a correlation, it may perhaps emerge by osmosis. >>> >>> >>> >>> Karl, I have to think turning a 15K RPM on it's head over a, admittedly >>> long period, has to have an effect. Cumulatively you're going to get uneven >>> wear on the bearings. Also the wear is going to be strongly non linear. >>> Even if it's not a factor today due to current production tolerances and >>> HVAC, it must become a factor eventually, though maybe not necessarily in >>> our lifetime. >>> >>> >>> >>> Kind regards >>> >>> >>> >>> Paul Wilkins >>> >>> >>> >>> On Tue, 20 Aug 2019 at 19:59, Peter Betyounan < >>> [email protected]> wrote: >>> >>> Easy solution , move to all flash, predicable failures and wear. >>> >>> >>> >>> Tue, 20 Aug at 4:07 pm, <[email protected]> wrote: >>> >>> >>> >>> >>> >>> >>> >>> Has anyone ever noticed a pattern of disks in equatorial latitudes >>> lasting significantly longer than say Sydney or Melbourne? I notice the >>> Foucault Period for Brisbane is 52hrs vs Melbourne's 39hrs and can't but >>> wonder if this doesn't mean Brisbane based DCs will have their disks last >>> 30% longer, or Darwin x3. >>> >>> >>> >>> >>> >>> Kind regards >>> >>> >>> >>> Paul Wilkins >>> >>> _______________________________________________ >>> >>> AusNOG mailing list >>> >>> [email protected] >>> >>> http://lists.ausnog.net/mailman/listinfo/ausnog >>> >>> _______________________________________________ >>> >>> AusNOG mailing list >>> >>> [email protected] >>> >>> http://lists.ausnog.net/mailman/listinfo/ausnog >>> >>> _______________________________________________ >>> >>> AusNOG mailing list >>> >>> [email protected] >>> >>> http://lists.ausnog.net/mailman/listinfo/ausnog >>> >>> >>> >>> >>> >>> >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >>> Virus-free. >>> www.avg.com >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >>> <#m_-7990684703058401871_m_-830375872720839702_m_2296110433590984146_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>> _______________________________________________ >>> AusNOG mailing list >>> [email protected] >>> http://lists.ausnog.net/mailman/listinfo/ausnog >>> >> _______________________________________________ >> AusNOG mailing list >> [email protected] >> http://lists.ausnog.net/mailman/listinfo/ausnog >> > _______________________________________________ > AusNOG mailing list > [email protected] > http://lists.ausnog.net/mailman/listinfo/ausnog >
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