We are now mostly recovered from a campus wide power outage.


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Message boards : News : We are now mostly recovered from a campus wide power outage.

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Sten-Arne
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Message 1431444 - Posted: 21 Oct 2013, 15:20:49 UTC - in response to Message 1431150.
Last modified: 21 Oct 2013, 15:28:25 UTC

It would be interesting to hear what broke in Marvin.


Probably all the diodes down the left side.


Or all the diodes down the side that was left :-)
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Message 1431449 - Posted: 21 Oct 2013, 15:28:35 UTC - in response to Message 1431444.

It would be interesting to hear what broke in Marvin.


Probably all the diodes down the left side.


Or all diodes down the side that was left :-)


Right.

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Message 1431451 - Posted: 21 Oct 2013, 15:34:09 UTC
Last modified: 21 Oct 2013, 15:34:52 UTC

Language games aside, it would be interesting to know where the magic smoke was leaking from.

As for Datacenter functionality in the face of a power outage? I strongly suspect that that datacenter is built on spec to be able to operate for <x> time in an outage. Since <x> is a real world measurement bounded by cost, <x> is going to be a modest number. Air conditioning systems for a facility are going to eat up a LOT of power generating capacity. At <y> % of remaining capacity on the system, the AC is probably powered down, and then after a few minutes, hardware is brought down. Cascading, controlled failure.

Profile Gary CharpentierProject donor
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Message 1431686 - Posted: 22 Oct 2013, 0:36:52 UTC - in response to Message 1431451.

Language games aside, it would be interesting to know where the magic smoke was leaking from.

As for Datacenter functionality in the face of a power outage? I strongly suspect that that datacenter is built on spec to be able to operate for <x> time in an outage. Since <x> is a real world measurement bounded by cost, <x> is going to be a modest number. Air conditioning systems for a facility are going to eat up a LOT of power generating capacity. At <y> % of remaining capacity on the system, the AC is probably powered down, and then after a few minutes, hardware is brought down. Cascading, controlled failure.

There may well be another consideration that happened. Generator for the datacenter may well have been adequate, if just the datacenter went down. However with the large area affected, decisions may have been made that the power from the generator was more useful elsewhere. It took the campus over two weeks to place all power back on the utility mains!

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Message 1434198 - Posted: 27 Oct 2013, 4:43:36 UTC

I am just wondering why the area is so prone to power outages.[/img]
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ClaggyProject donor
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Message 1434269 - Posted: 27 Oct 2013, 9:30:18 UTC - in response to Message 1434198.

I am just wondering why the area is so prone to power outages.

An abundance of thieves?

http://berkeley.patch.com/groups/police-and-fire/p/explosion-on-uc-berkeley-campus

Explosion at UC Berkeley: Campus Evacuated, Minor Injuries, Fire, 20 Trapped in Elevators

A loud electrical explosion in the center of the UC Berkeley campus Monday night – apparently caused by a copper theft – ignited a fire, left four people with injuries, forced a campus evacuation and left about 20 people stuck in elevators.


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Profile William
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Message 1450750 - Posted: 6 Dec 2013, 19:12:29 UTC - in response to Message 1434269.

I know very well the data center, as was one of the Project managers responsible for moving systems and servers around campus to the new installations end of 2005 and 2006 I believe - well they were new then, and the best data center I have seen.

How ever, thieves of copper wire in the states? Thought that was only here in São Paulo (Brasil) that idiots did those things, and even with lines with current flowing. So every now and then, you read about a few chared bodies found in manhole access in the city, where they thnk they can just cut a few 15kv lines out (connected) and they will live to enjoy the spoils.

Yea,the idiots around the world are all the same. Shame to hear about this in the Berkley área where there are suppose to be above average of educated population, and would consider thieves with a little over a above knowdlege of danger.


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Allen
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Message 1468828 - Posted: 25 Jan 2014, 18:47:37 UTC - in response to Message 1427069.

I have been supporting SETI for more than 15 years


Hard to support SETI for more than 15 years when they are just coming up on their 15th Ani in April 2014.

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Message 1468831 - Posted: 25 Jan 2014, 19:00:43 UTC
Last modified: 25 Jan 2014, 19:01:01 UTC

I hope the servers completely recover, i have two tasks to report.
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Profile Donald L. JohnsonProject donor
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Message 1469225 - Posted: 26 Jan 2014, 18:10:34 UTC - in response to Message 1468831.

I hope the servers completely recover, i have two tasks to report.

The outage this thread refers to occurred in October 2013. Recovery from that episode is long since complete. More recent, short-term outages are discussed in the Panic Mode threads in the Number Crunching Forum.
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Message boards : News : We are now mostly recovered from a campus wide power outage.

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