From owner-freebsd-questions@FreeBSD.ORG Mon Jan 19 15:31:10 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EB45F16A4CF for ; Mon, 19 Jan 2004 15:31:10 -0800 (PST) Received: from infidyne.com (io.infidyne.com [212.112.161.72]) by mx1.FreeBSD.org (Postfix) with SMTP id E746243D55 for ; Mon, 19 Jan 2004 15:31:07 -0800 (PST) (envelope-from peter.schuller@infidyne.com) Received: (qmail 20442 invoked from network); 19 Jan 2004 23:31:06 -0000 Received: from localhost (HELO scode.mine.nu) (scode@127.0.0.1) by localhost with SMTP; 19 Jan 2004 23:31:06 -0000 Received: from localhost (localhost [127.0.0.1]) by scode.mine.nu (Postfix) with ESMTP id 25CB653159 for ; Tue, 20 Jan 2004 00:31:32 +0100 (CET) From: Peter Schuller To: Date: Tue, 20 Jan 2004 00:31:30 +0100 User-Agent: KMail/1.5.4 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200401200031.31026.peter.schuller@infidyne.com> Subject: Unexpected soft update inconsistency X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jan 2004 23:31:11 -0000 Hello, What's the deal with soft updates and guaranteed consistency? Every time journaling is brought up by someone, he/she is promptly told about how soft updates does the job at least as well. I never had a problem with this based on what I have read about soft updates. However: I *very* quickly ran into a case where I got an "unexpected soft update inconsistency" after crashing the machine by doing something naughty with Vinum while there was disk activity (note: the filesystem which exhibited the problem was not on a vinum volume). So my question is: Do soft updates, or do they not, algorithmically guarantee filesystem meta-data consistency in the event of a crash? or to put it another way: Was this an implementation bug or a fact of life with soft updates? Thanks, -- / Peter Schuller, InfiDyne Technologies HB PGP userID: 0xE9758B7D or 'Peter Schuller ' Key retrieval: Send an E-Mail to getpgpkey@scode.org E-Mail: peter.schuller@infidyne.com Web: http://www.scode.org