Update on this morning's outage
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Re: Update on this morning's outage
21-02-2008 7:07 PM
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If that was aimed at me then I am not sure what you mean.
When a UPS kicks in, my understanding is that it provides output to a unit (computer) and isolates it from the mains. No power would have got back to the building's mains supply.
Re: Update on this morning's outage
21-02-2008 7:18 PM
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If they have to work on a completely isolated building or system, they will most certainly NOT want any voltage floating about regardless of the source..
Anyway, we could be having a post mortem about this for weeks on end, just like the last email problem, so I politely suggest that we stop any conspiracy theories on this.. however, tin foil hats and black helicopters are available on request.
Re: Update on this morning's outage
21-02-2008 7:26 PM
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Re: Update on this morning's outage
21-02-2008 9:17 PM
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Re: Update on this morning's outage
21-02-2008 9:24 PM
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Re: Update on this morning's outage
21-02-2008 9:25 PM
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Quote from: donj53 Sorry but I still don't understand how the ups didn't keep your servers running until they shutdown cleanly.I have a £15 ups which closes my computer down in the event of a power-outage without any problems.
Because, as already stated, the contractors effectively pressed the Emergency Power Off (EPO) button. Most datacentres have large UPS's which supply PDUs in the server cabinets. The EPO button effectively switches off these UPS's. Most datacentres do not have individual UPS's for each individual server these days, mainly due to the additional environmental impact these have.
Re: Update on this morning's outage
21-02-2008 10:17 PM
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In a scenario where there is any potential risk to the staff due to powered equipment it is mandatory that a total shutdown capability is provided. In my industry this was referred to as the full emergency stop and was normally a large red button. If this was hit it took all the power off regardless as to whether it would potentially cause equipment problems or damage. This was different to a controlled emergency stop where the system remained powered but stopped as quickly as possible. Interestingly the controlled emergency stop normally stopped things quicker than the full emergency stop where all power was removed and the brakes automatically applied.
In the case we are talking about the design is intended to remove all power from the equipment and hence make it safe if something has gone very badly wrong. The assumption is that this would only be used in a dire emergency and not if a poorly trained or inexperienced sub contractor thought it was a local isolation switch (my supposition - may not be correct)
Re: Update on this morning's outage
21-02-2008 10:26 PM
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I thought Mark's post made it pretty clear that Plusnet are as unhappy as we all are and that there were going to be some "interesting" discussions between Plusnet and the management of the data centre, not least as to how there could be obviously planned work (contractors are not working on site at 1 am without it being planned) without Plusnet being notified. Another question I bet is being asked is how the contractors didn't know that it was a 24 hour operation and that they couldn't just turn the power off, and lastly how come contractors were not being supervised in a way that would have allowed someone to step in and prevent the "human error"?
The action taken by Plusnet to get things up and running again is to be applauded. The one area where they failed (which they have admitted) was the poor communication. The fact that if the main systems are down there is no way a service status announcement can be made is pathetic. Five years ago I was advocating that there needed to be a service status system which was totally independent of all other Plusnet systems - surely they could now put a server for this in another BT site which could be updated using by a dialup modem in an emergency.
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Update on this morning's outage
21-02-2008 10:34 PM
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Quote from: jelv [...] surely they could now put a server for this in another BT site which could be updated using by a dialup modem in an emergency.
That's what I always thought servicestatus.net was going to become. Maybe PN will take another look at that now they've experienced a scenario in which it would have been useful.
Re: Update on this morning's outage
21-02-2008 10:47 PM
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http://www.servicestatus.net/index/
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Update on this morning's outage
21-02-2008 10:59 PM
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Quote The fact that if the main systems are down there is no way a service status announcement can be made is pathetic.
Totally agreed.
Quote Maybe PN will take another look at that now they've experienced a scenario in which it would have been useful.
We most certainly will.
Re: Update on this morning's outage
22-02-2008 12:51 PM
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Quote from: Be3G That's what I always thought servicestatus.net was going to become. Maybe PN will take another look at that now they've experienced a scenario in which it would have been useful.
Already being looked at. The intention is to host the (currently in development) new Service Status tool at servicestatus.net.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Update on this morning's outage
22-02-2008 12:55 PM
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Whereas when PN have a problem, you can't find out online, you have to phone up instead.
Made me chuckle a bit anyways.
Re: Update on this morning's outage
22-02-2008 7:45 PM
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Re: Update on this morning's outage
22-02-2008 7:59 PM
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