[AusNOG] OT: Brisbane Storm. Gentlemen, start your engines..

[Scott Howard]

Long term, are you actually expecting your small, in-rack UPS to be higher
MTBF (and/or lower MTTR) that the datacenters UPS/generator?

If you actually believe that's the case, it's probably time to change
datacenters.

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.

  Scott.



On Wed, Dec 15, 2010 at 9:55 PM, Skeeve Stevens <Skeeve at eintellego.net>wrote:

> 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?
>
> I'm talking only something that gives a short period of time to deal with
> cutover delays as exampled here.
>
> The ups can always be powered by dual feeds with a transfer switch.
> Thoughts?
>
> ...Skeeve
> --
> From the Blackberry Bold 9700 of Skeeve Stevens
>
> ----- Original Message -----
> From: Tony [mailto:td_miles at yahoo.com]
> Sent: Thursday, December 16, 2010 04:45 PM
> To: Sean K. Finn <sean.finn at ozservers.com.au>; craig at askings.com.au <
> craig at askings.com.au>
> Cc: 'ausnog at ausnog.net' <ausnog at ausnog.net>
> Subject: Re: [AusNOG] OT: Brisbane Storm. Gentlemen, start your engines..
>
> I was at Fujitsu (for an unrelated incident) when this happened today.
>
> From what I can gather a UPS failed at some point while they were switching
> load to generators in preparation for the impending storm.
>
> 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.
>
> 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).
>
>
> regards,
> Tony.
>
>
> --- On Thu, 16/12/10, craig at askings.com.au <craig at askings.com.au> wrote:
>
>
> > Yes, further reports I have indicate
> > it was only part of the DC that had
> > issues.
> >
> > Craig.
> >
> > > Is that Bris Tech Park?
> > >
> > > From: ausnog-bounces at lists.ausnog.net
> > > [mailto:ausnog-bounces at lists.ausnog.net]
> > On Behalf Of Joshua Lehman
> > > Sent: Thursday, 16 December 2010 2:14 PM
> > > To: craig at askings.com.au
> > > Cc: ausnog at ausnog.net
> > > Subject: Re: [AusNOG] OT: Brisbane Storm. Gentlemen,
> > start your engines..
> > >
> > > Yes
> > > On Thu, Dec 16, 2010 at 2:13 PM,
> > > <craig at askings.com.au<mailto:craig at askings.com.au>>
> > wrote:
> > > 8 mile plains DC ?
> > >
> > >> It looks like the DC at Fujitsu is having issues
> > apparently the UPS have
> > >> failed.
> > >>
> > >
> > >
> >
>
>
>
>
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