From owner-freebsd-hackers Mon Oct 12 08:39:54 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id IAA10777 for freebsd-hackers-outgoing; Mon, 12 Oct 1998 08:39:54 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from mrelay.jrc.it (mrelay.jrc.it [139.191.1.65]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA10757 for ; Mon, 12 Oct 1998 08:39:49 -0700 (PDT) (envelope-from nick.hibma@jrc.it) Received: from elect8 (elect8.jrc.it [139.191.71.152]) by mrelay.jrc.it (LMC5692) with SMTP id RAA01947; Mon, 12 Oct 1998 17:39:31 +0200 (MET DST) Date: Mon, 12 Oct 1998 17:39:29 +0200 (MET DST) From: Nick Hibma X-Sender: n_hibma@elect8 Reply-To: Nick Hibma To: dag-erli@ifi.uio.no cc: FreeBSD hackers mailing list Subject: Re: filesystem safety and SCSI disk write caching In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > Even with an UPS, a large percentage of our unclean shutdowns are power > > related. Most of these are due to power outages that last longer than > > our UPS batteries. > > 1.5) When the UPS reports that the battery is running low, shut > everything down. 1.5a tell the UPS to tell you n minutes in advance that it is going to run out of batteries, n being the time needed to shutdown and halt all attached machines 1.5b tell the UPS to switch itself off just before halting the controlling machine. Tell it as well to not switch itself on unless it has power for n minutes. or at least, that is what we are doing here and that scheme works. If you think you bought your UPS for nought, move to Italy :-) Nick -- building: 27A address: STA-ISIS, T.P.270, Joint Research Centre, 21020 Ispra, Italy tel.: +39 332 78 9549 fax.: +39 332 78 9185 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message