power outage and some servers/machines turn on automatically?

I have about 30 servers hooked up to UPSes and we had a power outage. When the power was restored, half of the machines powered on.

Why is this? How can we prevent this?
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shankshankAsked:
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Scotty_ciscoConnect With a Mentor Commented:
Check bios settings see if they are set to turn on after power recovery ... or are you talking that now 1/2 of the machines have failed hardware wise?

Thanks
Scott
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CallandorConnect With a Mentor Commented:
There's typically a setting in the BIOS to power-on after a power outage event.  If you set it to not power on in that situation, it will stay powered off.
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