On Friday 30 January 2009 09:32:27 Sorin Srbu wrote:
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Scott Silva Sent: Thursday, January 29, 2009 5:37 PM To: centos@centos.org Subject: Re: [CentOS] Emergency rescue help needed
If you had many power failures, the filesystem might just be severely trashed. Journals and files out of sync, etc... If a good fsck didn't fix it, you might just be in for a wipe-reinstall, or many hours of finding and fixing corrupted files.. [...]
A UPS hasn't previously been mentioned AFAICT, or possibly I missed it... You do have one connected, don't you?
The controlled shutdown a UPS usually offers at power/brownouts, is a really good solution IMHO.
The APC unit has had more to handle lately than you should reasonably expect. It wasn't getting chance to recharge before the next incident. I'm not blaming it.
Anne
On 1/30/09, Anne Wilson cannewilson@googlemail.com wrote:
On Friday 30 January 2009 09:32:27 Sorin Srbu wrote:
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Scott Silva Sent: Thursday, January 29, 2009 5:37 PM To: centos@centos.org Subject: Re: [CentOS] Emergency rescue help needed
If you had many power failures, the filesystem might just be severely trashed. Journals and files out of sync, etc... If a good fsck didn't fix it, you might just be in for a wipe-reinstall, or many hours of finding and fixing corrupted files.. [...]
A UPS hasn't previously been mentioned AFAICT, or possibly I missed it... You do have one connected, don't you?
The controlled shutdown a UPS usually offers at power/brownouts, is a really good solution IMHO.
The APC unit has had more to handle lately than you should reasonably expect. It wasn't getting chance to recharge before the next incident. I'm not blaming it.
Anne
We had a back-hoe related episode about 4 mnths ago which led to much flakiness for weeks until a "power company from scotland" got round to sorting it out. Lots of time spent at 110VAC (from 240V) and many momentary flickerings.
Eventually the older (nearing their natural end of life) apc batteries finally failed, the newer apc were unaffected. All boxen not connected to ups died because of psu failures (brandname - full range input voltages) One box had a mobo failure as well but this we suspect was secondary to the psu letting out the magic smoke.
The sumo boxen sailed through it all with no problems whatsoever not even stuttering
http://www.sumotech.com/english/home/
the old laptops that we use for non-essential network services were ok as were the big servers/switches and routers behind the new UPSs.
We have now fitted an isolating switch and a generator as this is a regular occurrence (17miles from Glasgow but rotten infrastructure)
now we just need to work out how to get BT to replace the rotten copper in the POTS system -used to get 1.4Mbs, now getting a flaky 300Kbs down (yet 800 up!) and BT's response was to decrease the "fault report level".
mike
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf
Of
Michael Simpson Sent: Friday, January 30, 2009 11:45 AM To: CentOS mailing list Subject: Re: [CentOS] Emergency rescue help needed
[...snipped...] BT's response was to decrease the "fault report level".
LOL! Good one!
On Fri, Jan 30, 2009 at 10:45:11AM +0000, Michael Simpson wrote:
now we just need to work out how to get BT to replace the rotten copper in the POTS system -used to get 1.4Mbs, now getting a flaky 300Kbs down (yet 800 up!) and BT's response was to decrease the "fault report level".
Utilities here in Northeast USA are famous for not wanting to upgrade infrastructure until they get a law passed/tariff changed that allows them to assess the customers directly for the costs.
One of the best upgrades Philadelphia ever got was when a fire inside a tunnel took out almost all of the "wire" that connected that city to the ROW.
You may have to contact a local, nearly destitute contractor for some "midnight backhoe service" ... (kidding, not a good idea.)
There is an excellent book titled "The Power struggle" which goes over the (colorful) history of how power utilities manipulate and control their customers to increase their profits while simultaneously making sure those same profits don't show up in the accounting..
Its a very unequal struggle. the power companies hire full time legal professionals to manipulate the utilities commissions and the other side is populated by a people who have keep their day job and have little money to spare on the same effort. (compared to the millions the power companies will spend).
The same dynamics apply to the telecom and cable utilities.
But not to the highway system. That area has an entirely different set of issues.. :-)
JK
on 1-30-2009 5:20 AM jkinz@kinz.org spake the following:
On Fri, Jan 30, 2009 at 10:45:11AM +0000, Michael Simpson wrote:
now we just need to work out how to get BT to replace the rotten copper in the POTS system -used to get 1.4Mbs, now getting a flaky 300Kbs down (yet 800 up!) and BT's response was to decrease the "fault report level".
Utilities here in Northeast USA are famous for not wanting to upgrade infrastructure until they get a law passed/tariff changed that allows them to assess the customers directly for the costs.
One of the best upgrades Philadelphia ever got was when a fire inside a tunnel took out almost all of the "wire" that connected that city to the ROW.
You may have to contact a local, nearly destitute contractor for some "midnight backhoe service" ... (kidding, not a good idea.)
There is an excellent book titled "The Power struggle" which goes over the (colorful) history of how power utilities manipulate and control their customers to increase their profits while simultaneously making sure those same profits don't show up in the accounting..
Its a very unequal struggle. the power companies hire full time legal professionals to manipulate the utilities commissions and the other side is populated by a people who have keep their day job and have little money to spare on the same effort. (compared to the millions the power companies will spend).
The same dynamics apply to the telecom and cable utilities.
But not to the highway system. That area has an entirely different set of issues.. :-)
JK
I work for a privately held water utility, and I'm sure that we do the same thing. Since the public owns the infrastructure, they get to pay for it.
-
Anne Wilson -
jkinz＠kinz.org -
Michael Simpson -
Scott Silva -
Sorin Srbu