Date: Fri, 31 Aug 2001 21:57:07 -0700 (PDT) From: Tony <tony@idk.com> To: freebsd-questions@freebsd.org Subject: Re: Clearing DTR with "halt -p" ? Message-ID: <200109010457.VAA27873@idk.com> In-Reply-To: <00db01c1329b$d736d860$1401a8c0@tedm.placo.com> from "Ted Mittelstaedt" at Aug 31, 2001 09:09:05 PM
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I know that the APC Smart UPS when you tell them to shutdown it actually delays the shutdown for sometime in order for whatever OS to shut itself down gracefully. When power returns the batteries will charge to a preset level before turning on the power outlets to protect from power cycles (on/off within second). The recharge usually insures enough time for another power off shortly after the power on. I have a APC smart ups 700, (I found free software support for Freebsd) that does just what I said above. It really work, I have pulled the plug to the UPS and watched everything shutdown and then restart with power Not all the of APC units support this feature thou. > > I think that that pin doesen't actually turn off the APC UPS but > instead turns off the outlets on the APC UPS. The idea (which is > a good one BTW) is that once the PC has shut down you want to > turn it off so that the UPS batteries are preserved. Then when > mains power comes back on the UPS turns the outlets back on and the > PC restarts. > > Ted Mittelstaedt tedm@toybox.placo.com > Author of: The FreeBSD Corporate Networker's Guide > Book website: http://www.freebsd-corp-net-guide.com > > > >-----Original Message----- > >From: owner-freebsd-questions@FreeBSD.ORG > >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Rino Mardo > >Sent: Friday, August 31, 2001 9:40 AM > >To: Rich Winkel; freebsd-questions@FreeBSD.ORG > >Subject: Re: Clearing DTR with "halt -p" ? > > > > > >just curious. what's the point of having a ups if you're going to switch it > >off when not in use? the batteries will not be fully charged then. > > > >just my 2cents curiosity. > > > > > > > >----- Original Message ----- > >From: Rich Winkel <rich@math.missouri.edu> > >To: <freebsd-questions@freebsd.org> > >Sent: Saturday, September 01, 2001 12:04 AM > >Subject: Clearing DTR with "halt -p" ? > > > > > >> Hi, > >> > >> I have an APC UPS which will turn off when a certain pin goes low. > >> Using the windows signalling cable this pin is connected to the > >> serial port's DTR pin. > >> > >> Is there a way to clear DTR during "halt -p" after the disks are synced? > >> > >> Thanks, > >> Rich > >> > >> > >> To Unsubscribe: send mail to majordomo@FreeBSD.org > >> with "unsubscribe freebsd-questions" in the body of the message > > > > > >_________________________________________________________ > >Do You Yahoo!? > >Get your free @yahoo.com address at http://mail.yahoo.com > > > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org > >with "unsubscribe freebsd-questions" in the body of the message > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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