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Thread ID: 103929	2009-10-11 02:04:00	AirNZ + DR	somebody (208)	PC World Chat

Post ID	Timestamp	Content	User
819159	2009-10-13 06:40:00	they where doing UPS maintenance and bypassed the UPS and had the data centre on generator power. the generator died (about 9:20am), the servers died. power was restored quite quickly (about 9:30am) clean up of the servers took longer than expected and so management called for DR about 10:30am prod clean-up took till 10pm Sunday, not sure when they switch back from DR. FYI, I don't work for air-NZ or IBM, but I do have friends in the right places to get an overview of what went wrong. Thanks for the update - it's good to know that they actually have a DR environment.	somebody (208)
819160	2009-10-13 07:05:00	they where doing UPS maintenance and bypassed the UPS and had the data centre on generator power. the generator died (about 9:20am), the servers died. power was restored quite quickly (about 9:30am) clean up of the servers took longer than expected and so management called for DR about 10:30am prod clean-up took till 10pm Sunday, not sure when they switch back from DR. FYI, I don't work for air-NZ or IBM, but I do have friends in the right places to get an overview of what went wrong. Their switching circuitry should have an allowance for bypassing the UPS whilst remaining on a mains feed; that way you can cut the UPS out for a few minutes without having to boot your genny. Having both options is preferable though, particularly if you have a lumpy mains feed. If they opted to run off the genny it must've been substantial maintenance!	nofam (9009)
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