Date: Thu, 13 Jun 2002 16:21:51 +0200 From: Ruben de Groot <fbsd-q@bzerk.org> To: Jon Larssen <jonlarssen@hotmail.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: UPS scenario; HOWTO? Message-ID: <20020613162151.A63548@ei.bzerk.org> In-Reply-To: <F9R2J1EoqOGwJjIyuHc0001bedd@hotmail.com>; from jonlarssen@hotmail.com on Thu, Jun 13, 2002 at 09:34:57AM -0400 References: <F9R2J1EoqOGwJjIyuHc0001bedd@hotmail.com>
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On Thu, Jun 13, 2002 at 09:34:57AM -0400, Jon Larssen typed: > Hi, > > I'm adding a UPS to my FreeBSD server, and after reading docs and such, I > think I understand the process. But I have one question regarding a far > fetched scenario. Just imagine this: > > (1) Power goes out, the UPS goes into "battery" mode. > > (2) The power daemon notices this and allows a 5 minutes > (complete configurable) grace time just in case > power is restored in that chunk of time. > > (3) Tough luck! Nope, no AC power. The power daemon than > signals the operating system to shutdown. > > (4) As was told to do so, FreeBSD will shutdown. That > ends with a message of the like of "Press any key > to reboot". > > (5) The server, then, is officially halted. We've got no > AC power and the UPS battery will soon be drained > out. > > (6) Wait! AC is restored and the UPS was still up. The > lights go green and the buzzer finally quiets. But > the server will be in "Press any key to reboot" mode > indefinitely... > > or until wither me or one of my coworkers actually press a key. > > This problem has a solution? Hack? Workaround? When using APM you can halt the server with shutdown -p. That way the power will be turned off completely. When AC is restored later, the system will boot again. > > Best regards, > Jon Larssen. > > _________________________________________________________________ > Chat with friends online, try MSN Messenger: http://messenger.msn.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
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