From owner-freebsd-scsi Mon Oct 19 10:48:21 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA28452 for freebsd-scsi-outgoing; Mon, 19 Oct 1998 10:48:21 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from smtp01.primenet.com (smtp01.primenet.com [206.165.6.131]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA28421; Mon, 19 Oct 1998 10:48:12 -0700 (PDT) (envelope-from tlambert@usr02.primenet.com) Received: (from daemon@localhost) by smtp01.primenet.com (8.8.8/8.8.8) id KAA21084; Mon, 19 Oct 1998 10:47:47 -0700 (MST) Received: from usr02.primenet.com(206.165.6.202) via SMTP by smtp01.primenet.com, id smtpd021057; Mon Oct 19 10:47:40 1998 Received: (from tlambert@localhost) by usr02.primenet.com (8.8.5/8.8.5) id KAA28054; Mon, 19 Oct 1998 10:47:39 -0700 (MST) From: Terry Lambert Message-Id: <199810191747.KAA28054@usr02.primenet.com> Subject: Re: filesystem safety and SCSI disk write caching To: gibbs@plutotech.com (Justin T. Gibbs) Date: Mon, 19 Oct 1998 17:47:39 +0000 (GMT) Cc: tlambert@primenet.com, julian@whistle.com, guido@gvr.org, dkelly@hiwaay.net, freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG In-Reply-To: <199810182308.RAA21386@pluto.plutotech.com> from "Justin T. Gibbs" at Oct 18, 98 05:01:30 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > >Perhaps they realized that the mpst likely event after a power > >fluctuation was a bus reset, and figured "why bother?". > > And why is this relevant? The only reasons allowed for cache contents > never making it to the disk are power loss and hardware failure. A > bus reset (assuming the hard reset alternative is in effect) only clears > any transactions that have not been reported as completed to the host. > > Perhaps you should add the SCSI II and SCSI II specs to your list of things > to read. Feel free to engage in Ad Hominim attacks, *after* you explain why Don Lewis is seeing the empirical behaviour he is seeing, in contradiction to your claims of what's possible and not. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message