From owner-freebsd-stable@FreeBSD.ORG Wed Nov 1 21:03:03 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2420A16A415 for ; Wed, 1 Nov 2006 21:03:03 +0000 (UTC) (envelope-from bob@immure.com) Received: from flpvm23.prodigy.net (flpvm23.prodigy.net [207.115.20.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 48BDE43D4C for ; Wed, 1 Nov 2006 21:02:54 +0000 (GMT) (envelope-from bob@immure.com) X-ORBL: [66.136.206.1] Received: from maul.immure.com (adsl-66-136-206-1.dsl.austtx.swbell.net [66.136.206.1]) by flpvm23.prodigy.net (8.13.7 out spool5000 dk/8.13.7) with ESMTP id kA1L2wX0004178 for ; Wed, 1 Nov 2006 13:02:58 -0800 Received: from rancor.immure.com (rancor.immure.com [10.1.132.9]) by maul.immure.com (8.13.6/8.13.6) with ESMTP id kA1L2hYq009295 for ; Wed, 1 Nov 2006 15:02:43 -0600 (CST) (envelope-from bob@immure.com) Received: from rancor.immure.com (localhost [127.0.0.1]) by rancor.immure.com (8.13.6/8.13.6) with ESMTP id kA1L2hn3019993 for ; Wed, 1 Nov 2006 15:02:43 -0600 (CST) (envelope-from bob@rancor.immure.com) Received: (from bob@localhost) by rancor.immure.com (8.13.6/8.13.6/Submit) id kA1L2hZu019992 for freebsd-stable@freebsd.org; Wed, 1 Nov 2006 15:02:43 -0600 (CST) (envelope-from bob) Date: Wed, 1 Nov 2006 15:02:43 -0600 From: Bob Willcox To: freebsd-stable@freebsd.org Message-ID: <20061101210243.GG98766@rancor.immure.com> References: <45470D95.5020801@qbrick.com> <454718DD.8060108@qbrick.com> <45471ACC.2030604@fer.hr> <4547421D.2010206@qbrick.com> <45477FCC.9050901@qbrick.com> <4547DD7E.4030509@qbrick.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4547DD7E.4030509@qbrick.com> User-Agent: Mutt/1.5.12-2006-07-14 X-immure-MailScanner-Information: Please contact the ISP for more information X-immure-MailScanner: Found to be clean X-immure-MailScanner-From: bob@immure.com X-Spam-Status: No Subject: Re: SAS Raid - mfi driver X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Bob Willcox List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Nov 2006 21:03:03 -0000 On Wed, Nov 01, 2006 at 12:34:22AM +0100, Fredrik Widlund wrote: > Yes, it forces writeback even when the controller has no BBU. Choosing > WBack itself will default back to WThru. It's dangerous, but I guess it > should be much less dangerous than using for example softupdates. I don't see how it could be *less* dangerous than using softupdates. Any loss of power while writing and it seems to me that you are going to be screwed w/o a BBU. [snip] -- Bob Willcox Possessions increase to fill the space bob@immure.com available for their storage. Austin, TX -- Ryan