Followup to: UPS initiated autoshutdown

[Karl Denninger]

In article <216 at tnl.UUCP> norstar at tnl.UUCP (Daniel Ray) writes:
>
>Hi. A few weeks ago I posted an article here asking about a daemon that would
>sense a power failure and initiate an automatic shutdown within a controllable
>period of time. This would be used in conjunction with an uninterruptable
>power supply (battery backup) so the system could be brought down cleanly
>while power was still available thru the UPS. This was in the wake of a full
>hard disk destruction after a power failure, and we were not to be burned
>again.
>
>I received an enormous number of inquiries from people who wanted to know
>how to implement this!

We have software available to do this if you're running SCO Xenix.  It works
off an unused serial port.  SCO Xenix will handle two different signals --
line failure AND low battery -- making the shutdown operate only when the
UPS says it's about to poop out. 

We also have the same for 386/ix, but it won't do the second signal
monitoring -- thus you can only have a timed delay on 386/ix.

The software requires that you have a switched output from the UPS which
indicates these conditions.  The output absolutely must be isolated from the
cabinet of the UPS and other hardware -- there are a few UPSs out there
which don't do this; they short a line to cabinet ground through a pass
transistor -- these will NOT work.  Tripplite UPSs are ok; American Power
Conversion units will only provide one signal in this fashion.

You run the software from the "rc" scripts which start the system up; it
automatically backgrounds itself and will report status changes to the
console.  All terminals which are signed on will also be notified when the
utulity power goes off, if a shutdown is cancelled (by utility power being
restored), and just before the final shutdown is done.

Contact us for more details at (312) 566-8910 or send email.

--
Karl Denninger (karl at ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 312 566-8911], Voice: [+1 312 566-8910]
Macro Computer Solutions, Inc.		"Quality Solutions at a Fair Price"