Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!usc!orion.cf.uci.edu!uci-ics!zardoz!tgate!ka3ovk!ki4pv!cdin-1!icdi10!fr
From: fr@icdi10.UUCP (Fred Rump from home)
Newsgroups: comp.unix.questions
Subject: Re: Followup to: UPS initiated autoshutdown
Keywords: UPS, blackout, daemon
Message-ID: <364@icdi10.UUCP>
Date: 8 Jul 89 21:23:07 GMT
References: <216@tnl.UUCP>
Reply-To: fr@icdi10.UUCP (Fred Rump from home)
Organization: From Home but normally @ Compudata Inc. Phila PA
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In article <216@tnl.UUCP> norstar@tnl.UUCP (Daniel Ray) writes:

[deleted stuff]
>1. A TrippLite 450 Watt battery backup power supply (model BC-450), costing
>$299 thru Advanced Computer Products (714-558-8813). This same unit cost
[deleted stuff]
>provides 10-30 min of protection, has an audible alarm, a circuit breaker
>to protect against overloads, voltage regulation, square wave AC during
>battery power (some say this is not as good as pure sine waves, others say

Test your up time and see how long you really stay up.

Personally, I wish you the best of luck but we've long ago given up on 
inexpensive units like the TrippLite. When you sell UPS systems to customers 
it's like selling an insurance policy. And when they don't perform - boy are 
you up shits creek. We found that we need minimum of 450 watts and sine wave 
units. The square ones just don't seem to kick in in time all the time. Then 
what have you got? Nothing but a big battery that clucks at you.

We've come to expect to pay about a dollar a watt and then can expect good 
service. We have every one of over 100 Xenix/Unix systems on a UPS and 
wouldn't begin to accept any kind of service or warranty without it. We 
learned these lessaons the hard way out in the field. Electronics seems to run 
forever if you protect it from the vagaries of the outside electrical world.

>2. We are about to get Showdown unattended shutdown software/sensor from
>Continental Information Systems, 320 W. Irving Park Rd, Itasca, IL 60143
>(312-250-8111). This provides a device that plugs in and connects with
>a serial port for XENIX, 3B2, or System V/386 UNIX, and the daemon
>software which is configurable. TNL can't vouch for this one since we
>haven't done it yet. The cost is $195 right now.

With this extra expense you could have gotten one of the units that would 
have given you automatic protection. American Power comes to mind. There are 
several others but we really don't bother with the auto-shutdown units. When 
the power problems occur during the day, folks can normally shut down when 
they see the lights have gone off. This saves precious databases. During the 
night... so what? The systems will autoreboot anyway and no harm is done.

fr
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