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

[Marcus Emanuel @ HostCorp]

We Keep UPS's at the bottom of our 'Facility UPS Protected' Racks, but some
DC's frown upon it because they cant isolate power in the case of fire or
other emergency (even though its only likely to run for 10 mins or less)

In our experience to date, it hasn't saved us as UPS/Gen failures have all
been for longer than our UPS could sustain, but in the case of something 30
secs to 1 min like in that QLD DC today, we would have ridden it out so I
believe its got Merit for that 'rainy' day. And really its Cheap insurance. 

Note: We power only PSU2 of Dual PSU Devices with this so as not to
introduce a single point of failure. An ATS fed by the A+B Power Rails would
be the ideal scenario to feed PSU1 on these devices. So you kind of get '3
feed' coverage without reliance on any one of these.

Marcus.

-----Original Message-----
From: ausnog-bounces at lists.ausnog.net
[mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Skeeve Stevens
Sent: Thursday, 16 December 2010 4:56 PM
To: 'td_miles at yahoo.com'; 'sean.finn at ozservers.com.au';
'craig at askings.com.au'
Cc: 'ausnog at ausnog.net'
Subject: Re: [AusNOG] OT: Brisbane Storm. Gentlemen, start your engines..

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.
> >>
> >
> >
> 



      
_______________________________________________
AusNOG mailing list
AusNOG at lists.ausnog.net
http://lists.ausnog.net/mailman/listinfo/ausnog
_______________________________________________
AusNOG mailing list
AusNOG at lists.ausnog.net
http://lists.ausnog.net/mailman/listinfo/ausnog