Something that I have to keep reminding beancounters with A/B planning is don’t go above 40% load on either side.
Its very difficult to convince a CFO who’s entire life is spent with a spreadsheet open in front of him is that N+1 means typically Double, and that Kw != Kva. From: AusNOG <[email protected]> On Behalf Of Matt Perkins Sent: Tuesday, March 14, 2023 9:18 AM To: Christopher Hawker <[email protected]>; Nathan Brookfield <[email protected]>; [email protected] Subject: Re: [AusNOG] Vocus Datacentre outage. The questions left to be answered for Vocus is why did it take 12 hours to restore one rail. Where was the static bypass and failing that where was the maintenance bypass. Im guessing that's what it's on maintenance bypass now and the slow action may have something to do with the public holiday in Vic.. I shouldn't speculate. But it is fun. Something seriously let go in that UPS. If i had to put my electrical engineers hat on I would say their load capacitor maintenance was not done and let go. Or someone was working upstream and broke the natural/earth bond. But there's a lot of parts in a system like that , most modern DC UPS setups are fairly robust. I once had 3 strings of batteries catch fire and melt down and the UPS didn't miss a beat other then spewing a lot of alarms. We moved strings around on the fly and nobody even noticed. The other things that seems odd is why did an A failure trip B. Sounds like a single supply is at surge/break capacity. Also a worry. But in the end we all have redundancy around 530 Collins right ? Right ? Matt On 14/3/2023 11:50 am, Christopher Hawker wrote: SY1 apparently experienced a full power outage back in July 2009, according to AusNOG Archives. Some reported full outages, some partial. Was not a DC fault though, looks like a much larger grid issue where a fault at the Bayswater Power Station in the Hunter Valley (which affected generators in QLD and VIC) caused about 1000MW to be dropped from the grid, resulting in rolling blackouts across QLD, NSW, TAS, SA and VIC. https://lists.ausnog.net/pipermail/ausnog/2009-July/003222.html CH. _____ From: AusNOG <mailto:[email protected]> <[email protected]> on behalf of Nathan Brookfield <mailto:[email protected]> <[email protected]> Sent: Tuesday, March 14, 2023 11:40 AM To: Matt Perkins <mailto:[email protected]> <[email protected]>; [email protected] <mailto:[email protected]> <mailto:[email protected]> <[email protected]> Subject: Re: [AusNOG] Vocus Datacentre outage. Have 100% had A and B fail separately at SY1 but never both, thankfully!!! Could have been part of the facility though so don’t quote me. UK on the other hand, fail! From: Matt Perkins <mailto:[email protected]> <[email protected]> Sent: Tuesday, 14 March 2023 11:30 AM To: Nathan Brookfield <mailto:[email protected]> <[email protected]>; [email protected] <mailto:[email protected]> Subject: Re: [AusNOG] Vocus Datacentre outage. SY1 had A or B fail a few years back if my memory serves me correctly. But I was referring London and Manchester which both had total outages in recent years. Matt. On 14/3/2023 11:26 am, Nathan Brookfield wrote: I’ve never had an A+B power rail failure at Equinix in 18 years I’ve been in there facilities, TOUCH WOOD!!! Nathan Brookfield | VK2NAB General Manager p: 1300 592 330 | m: 0412 266 008 e: [email protected] <mailto:[email protected]> | w: iperium.com.au Suite 4.02, 189 Kent Street Sydney NSW 2000 Your Telco Team DISCLAIMER: This document is intended solely for the named addressee. 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From: AusNOG <mailto:[email protected]> <[email protected]> On Behalf Of Matt Perkins Sent: Tuesday, 14 March 2023 11:18 AM To: [email protected] <mailto:[email protected]> Subject: Re: [AusNOG] Vocus Datacentre outage. Yea because Eqinix has never had a power outage. :) I think it's a little premature to judge at the moment. Doesn't sound good based on the current info but we have all had bad days im sure. Matt On 14/3/2023 11:06 am, Bradley Amm wrote: Friends like let friends put gear in a Vocus dtacenter. Only NextDC or Equinix :) Sent from my iPhone On 14 Mar 2023, at 7:08 am, DaZZa <mailto:[email protected]> <[email protected]> wrote: Doesn't say a whole lot about Vocus' data center design methodology, nor their periodic contingency testing. They're apparently replacing the entire UPS on Friday - guess we can all expect more outages then when they stuff that up. D On Mon, 13 Mar 2023 at 18:30, Chad Kelly <[email protected] <mailto:[email protected]> > wrote: Thought I would create a new thread on this, as the issue wasn’t related to AussieBB. It is looking like this Melbourne outage is similar to the Sydney outage back in 2018, in that it appears to have been yet again caused by an issue with their UPS systems yet again. I’ll leave this hear https://www.arnnet.com.au/article/633314/servers-australia-uproots-services-after-vocus-data-centre-outage/ and this article on today’s outage as well. https://www.itnews.com.au/news/vocus-melbourne-data-centre-hit-by-power-outage-591987 Regards Chad. Chad Kelly Manager CPK Web Services Phone 03 52730246 Web https://www.cpkws.com.au <image001.jpg> _______________________________________________ AusNOG mailing list [email protected] <mailto:[email protected]> https://lists.ausnog.net/mailman/listinfo/ausnog -- veg·e·tar·i·an: Ancient tribal slang for the village idiot who can't hunt, fish or ride _______________________________________________ AusNOG mailing list [email protected] <mailto:[email protected]> https://lists.ausnog.net/mailman/listinfo/ausnog _______________________________________________ AusNOG mailing list [email protected] <mailto:[email protected]> https://lists.ausnog.net/mailman/listinfo/ausnog -- ** DO NOT SEND PRIVATE OR CONFIDENTIAL MATERIAL VIA EMAIL /* Matt Perkins Direct 02 8916 8101 Spectrum Networks Ptd. Ltd. 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