Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!mcdchg!ddsw1!karl From: karl@ddsw1.MCS.COM (Karl Denninger) Newsgroups: comp.unix.questions Subject: Re: Followup to: UPS initiated autoshutdown Summary: We have software for UPS monitoring and auto-shutdown for Xenix Keywords: UPS, blackout, daemon Message-ID: <1989Jul9.193016.9426@ddsw1.MCS.COM> Date: 9 Jul 89 19:30:16 GMT References: <216@tnl.UUCP> Reply-To: karl@ddsw1.MCS.COM (Karl Denninger) Organization: Macro Computer Solutions, Inc., Mundelein, IL Lines: 40 In article <216@tnl.UUCP> norstar@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@ddsw1.MCS.COM, !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"