<div>The power to our fibre to ethernet media converter only has a single PSU and for some reason when it lost its power and came back on it did not work. Doing a reboot of the device seemed to bring it back online again. I think this has prompted us to re look at how we are going to re connect our single PSU devices.</div>
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<div class="gmail_quote">On Thu, Dec 16, 2010 at 4:03 PM, Scott Howard <span dir="ltr"><<a href="mailto:scott@doc.net.au">scott@doc.net.au</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Long term, are you actually expecting your small, in-rack UPS to be higher MTBF (and/or lower MTTR) that the datacenters UPS/generator?<br>
<br>If you actually believe that's the case, it's probably time to change datacenters.<br><br>If you're in a datacenter that only supports providing a single source/feed to each rack then there's a slightly better argument for doing this (if only because it reduces the potential number of failure points between the UPS and the systems), but again, looking to a better datacenter will still be a better option.<br>
<font color="#888888"><br> Scott.</font>
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<div class="gmail_quote">On Wed, Dec 15, 2010 at 9:55 PM, Skeeve Stevens <span dir="ltr"><<a href="mailto:Skeeve@eintellego.net" target="_blank">Skeeve@eintellego.net</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0pt 0pt 0pt 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Ok, on this. What do people think of doing your own bottom of rack ups in datacentres which supposedly have good protection with UPS and Gensets, but given industry experience, aren't always 100% reliable?<br>
<br>I'm talking only something that gives a short period of time to deal with cutover delays as exampled here.<br><br>The ups can always be powered by dual feeds with a transfer switch. Thoughts?<br><br>...Skeeve<br><font color="#888888">--<br>
>From the Blackberry Bold 9700 of Skeeve Stevens<br></font>
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<div><br>----- Original Message -----<br>From: Tony [mailto:<a href="mailto:td_miles@yahoo.com" target="_blank">td_miles@yahoo.com</a>]<br>Sent: Thursday, December 16, 2010 04:45 PM<br>To: Sean K. Finn <<a href="mailto:sean.finn@ozservers.com.au" target="_blank">sean.finn@ozservers.com.au</a>>; <a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a> <<a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a>><br>
Cc: '<a href="mailto:ausnog@ausnog.net" target="_blank">ausnog@ausnog.net</a>' <<a href="mailto:ausnog@ausnog.net" target="_blank">ausnog@ausnog.net</a>><br>Subject: Re: [AusNOG] OT: Brisbane Storm. Gentlemen, start your engines..<br>
<br>I was at Fujitsu (for an unrelated incident) when this happened today.<br><br>From what I can gather a UPS failed at some point while they were switching load to generators in preparation for the impending storm.<br><br>
The net result was that one of the power feeds to our racks failed. The outage was short, somewhere between 1-30 seconds. Any equipment that was just on the "A" supply lost power and rebooted. Anything that was dual supply (A + B) was fine and continued without issue.<br>
<br>Morale of the story - make sure your gear either has dual PSU or you use a power transfer switch to plug all of your single PSU devices into both power feeds (of course you then have a single point of failure in the transfer switch, so choose your poison).<br>
<br><br>regards,<br>Tony.<br><br><br>--- On Thu, 16/12/10, <a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a> <<a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a>> wrote:<br>
<br><br>> Yes, further reports I have indicate<br>> it was only part of the DC that had<br>> issues.<br>><br>> Craig.<br>><br>> > Is that Bris Tech Park?<br>> ><br>> > From: <a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank">ausnog-bounces@lists.ausnog.net</a><br>
> > [mailto:<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank">ausnog-bounces@lists.ausnog.net</a>]<br>> On Behalf Of Joshua Lehman<br>> > Sent: Thursday, 16 December 2010 2:14 PM<br>> > To: <a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a><br>
> > Cc: <a href="mailto:ausnog@ausnog.net" target="_blank">ausnog@ausnog.net</a><br>> > Subject: Re: [AusNOG] OT: Brisbane Storm. Gentlemen,<br>> start your engines..<br>> ><br>> > Yes<br>> > On Thu, Dec 16, 2010 at 2:13 PM,<br>
> > <<a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a><mailto:<a href="mailto:craig@askings.com.au" target="_blank">craig@askings.com.au</a>>><br>> wrote:<br>> > 8 mile plains DC ?<br>
> ><br>> >> It looks like the DC at Fujitsu is having issues<br>> apparently the UPS have<br>> >> failed.<br>> >><br>> ><br>> ><br>><br><br><br><br><br>_______________________________________________<br>
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