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Author Topic: Heatwave outage - Belkin UPS failure  (Read 6323 times)

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John R Peck

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Heatwave outage - Belkin UPS failure
« on: June 29, 2009, 03:41:44 PM »
Apologies for the total loss of sound and vision today, June 29th 2009,
between 11:36 and 15:37 BST (GMT+1).  
We do hope this didn't spoil your enjoyment of the service too much.

In what is the first unplanned outage of the year, it appears that one of our Belkin Gold Series 625VA UPS boxes decided to just stop.  This was not because of power line problems - although testing before fully powering back up revealed that the UPS battery was useless in providing only 1 minute of power.   It is most likely that the UPS shut itself off due to overheating - a feature I wasn't aware it had - another not particularly useful mode of operation, combined with not powering itself on automatically when power is restored if the battery does run out during a power cut - hardly a design for a lights-out data centre.  

The UPS has now been replaced.  The battery in the defective unit has been changed and tested - this will now be a spare.

Coincidentally a full mirror of the server system was prepared at 04:57 the same day, so if all else fails again that can take over immediately if a problem is noted.  

The root cause of the outage appears then to be a 40C temporary heatwave in the wider environment which houses the UPS and server these days.  That being my loft space, which will be cooking this week by all weather accounts for the UK.  The server is in a ventilated enclosure, with ~26C air from the airing cupboard pumped in to the loft enclosure whenever the monitored temperature goes under or over set limits that were supposed to be appropriate for the units: this has so far maintained a min 14C max 38C in the enclosure; the B50 server is designed for 10-40C.  Clearly the UPS had other requirements today.  

The outage was a little longer than it might have been because of some other excitement we were watching at around the same time...

Chester is enduring a new wheelie-bin rubbish collection service this month, featuring now three large bins in place of simple bags, with three brand new trucks to empty each of the varying bin sizes.  At the "T" intersection of the road where I live, trucks have to turn round and back up each arm of the "T"-shaped close.  I expect other residents and their visitors might take pause to be more thoughtful about no longer adorning all the kerbs simultaneously.  Reversing in a pincer movement, the re-cycling "blue-bin" truck smashed into the driver's door on my neighbour's father's car - he's over 80.  Clearly for the truck driver it was an unfamiliarly large vehicle.  The new service takes a great deal longer to collect, employing around double the number of both vehicles and staff than before.  The bins are massive, unsightly and generally unwanted.  Last week, one nearby elderly woman fell over and broke her hip trying to move one of the heavy 240L bins to the edge of her property for the weekly collection.  The new council members responsible did not publicise or discuss the measures ahead of implementation - the previous council members who did a limited consultation were voted out largely because of their plans - the original research was re-cycled as the excuse for what has now happened, although most of the benefits being claimed as resident-requested were not even in the original questionnaire.  Basically it's been a tale of lies, corruption, and unaccountability in local government, leaving the residents with no other choice amongst the party blocks.  No sane person could claim this has anything positive to do with environmental issues.  
« Last Edit: June 30, 2009, 01:34:36 AM by John R Peck »