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Date: Sat, 15 Nov 1997 16:14:06 -0500 (EST)
From: Dev Chanchani <dev@wopr.inetu.net>
To: freebsd-isp@FreeBSD.ORG
Subject: Re: Power
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Thanks everyone, I have received many great replies. 

I will do some surfing and come up with a better model which I would be
happy to share.

Thanks again!

On Sat, 15 Nov 1997, Dev Chanchani wrote:

> 
> We had an extended power outage last night. After realizing that our UPS's
> would not keep our network up for the black-out, I ran to sears with a
> credit card and bought a Craftsman generator.
> 
> My lesson in power began :)
> 
> I was wondering if anyone has been through this and could help me on a
> couple of points:
> 
> We have our servers, switches and routers plugged into APS UPS's (600's
> and 650's). The UPS's are plugged into surge protectors. The surge
> protectors are plugged into 15 AMP 12 guage 100 ft extension coards. We
> ran the extension cords (took them out of the wall) and plugged them into
> the generator. The 650 UPS could not take it, it was flipping between
> generator power and UPS power every second. So... my questions are as
> follows:
> 
> 1. Can you plug a UPS -> Surge protector -> generator
> 2. Are there any specifics I should look for when planning the power setup
> of new servers and racks.
> 3. How much output does a genarator need per server (as a rule of thumb)?
> 4. Was the UPS switching from internal power to external power because the
> generator power was fluctuating, not enough power, etc?
> 
> If anyone has experience with this type of stuff, any help and information
> would be greatly appreciated.
> 
> Thanks in advance!
> 
> PS: To anyone who does not have experience in this, you might want to take
> a look, because its not fun to learn these things in total darkness in a 
> ice storm.. ;)
> 
>