From owner-freebsd-chat Fri May 10 10:31:50 2002 Delivered-To: freebsd-chat@freebsd.org Received: from mired.org (dsl-64-192-6-133.telocity.com [64.192.6.133]) by hub.freebsd.org (Postfix) with SMTP id 2177F37B401 for ; Fri, 10 May 2002 10:31:38 -0700 (PDT) Received: (qmail 81487 invoked by uid 100); 10 May 2002 17:31:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15580.1017.276905.556906@guru.mired.org> Date: Fri, 10 May 2002 12:31:37 -0500 To: Rahul Siddharthan Cc: chat@freebsd.org Subject: Re: My horror story In-Reply-To: <20020510140222.M57329@lpt.ens.fr> References: <000701c1f804$47d5dc00$6401a8c0@penguin> <20020510140222.M57329@lpt.ens.fr> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ From: Mike Meyer X-Delivery-Agent: TMDA/0.54 Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org In <20020510140222.M57329@lpt.ens.fr>, Rahul Siddharthan typed: > I think the conventional wisdom is that if you use sync mounts > (default) + softupdates, and turn off IDE write-caching, your > filesystem should always be in a consistent state. I'm no expert, I'm > quoting from the tuning(7) manpage and elsewhere... Three points of confusion here. One, the default mount is noasync, not sync. Two, softupdates is not orthogonal to the sync/noasync/async mount flag. It turns those off when you do the mount, so you really have four choices in that list: sync/softupdates/noasync/async. Finally, softupdates + write caching off will generally keep your directory tree in a consistent state, but that doesn't mean you can't lose data. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message