Date: Fri, 09 Aug 1996 02:52:32 -0400 From: "Gary Palmer" <gpalmer@freebsd.org> To: Dan Benjamin <dan@abyss.void.net> Cc: "freebsd-isp@freebsd.org" <freebsd-isp@freebsd.org> Subject: Re: UPS Systems Message-ID: <4151.839573552@orion.webspan.net> In-Reply-To: Your message of "Thu, 08 Aug 1996 12:02:10 EDT." <Pine.BSF.3.91.960808115914.257B-100000@abyss.void.net>
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Dan Benjamin wrote in message ID <Pine.BSF.3.91.960808115914.257B-100000@abyss.void.net>: > It would be nice to locate a UPS and software that would be smart enough > to actually shutdown the box when the time came and restart it later with > a power-cut (some I've seen play with run levels). Umm? The best that you can hope for is that monitoring s/w on the machine(s) notices that the battery is getting low and does the shutdown for you. The APC SmartUPS & MatrixUPS series can take SNMP cards and it's not THAT difficult to get a client monitoring the UPS and to do a shutdown when needed (The APC SNMP card will even give you an expected runtime estimate given current load :-) ). Reading through the SNMP MIB for the APC, it seems that it turns the power back on automatically on restoration of power (and from experience it does), but with SNMP you can configure a delay to allow the UPS to charge BEFORE starting to load it again. Even without the optional SNMP card, the APC BackupUPS (and higher) machines have serial ports which can be used to alert a daemon on the system to impending battery death. A lot of similar products from other manufacturers (ViewSonic, Tripp Lite, for example) have similar features, but I've only worked with the APC models. Gary -- Gary Palmer FreeBSD Core Team Member FreeBSD: Turning PC's into workstations. See http://www.FreeBSD.ORG/ for info
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