From owner-freebsd-stable@FreeBSD.ORG Tue Oct 28 08:42:20 2003 Return-Path: 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 92B3D16A4CE for ; Tue, 28 Oct 2003 08:42:20 -0800 (PST) Received: from smtp.covadmail.net (mx05.covadmail.net [63.65.120.65]) by mx1.FreeBSD.org (Postfix) with SMTP id 496C743FEC for ; Tue, 28 Oct 2003 08:42:18 -0800 (PST) (envelope-from strick@covad.net) Received: (covad.net 27766 invoked from network); 28 Oct 2003 16:42:12 -0000 Received: from unknown (HELO ice.nodomain) (67.101.98.68) by sun-qmail13 with SMTP; 28 Oct 2003 16:42:12 -0000 Received: from ice.nodomain (localhost [127.0.0.1]) by ice.nodomain (8.12.8p1/8.12.8) with ESMTP id h9SGgG8a000369; Tue, 28 Oct 2003 08:42:16 -0800 (PST) (envelope-from dan@ice.nodomain) Received: (from dan@localhost) by ice.nodomain (8.12.8p1/8.12.8/Submit) id h9SGgGBs000368; Tue, 28 Oct 2003 08:42:16 -0800 (PST) Date: Tue, 28 Oct 2003 08:42:16 -0800 (PST) From: Dan Strick Message-Id: <200310281642.h9SGgGBs000368@ice.nodomain> To: pmes@btinet.net In-Reply-To: <3F9668A8.90702@btinet.net> cc: dan@ice.nodomain cc: freebsd-stable@freebsd.org cc: freebsd-current@freebsd.org Subject: Re: UFS file system problem in either stable or current X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Oct 2003 16:42:20 -0000 On Wed, 22 Oct 2003 06:23:20 -0500, Peter Schultz wrote: > > Dan Strick wrote: > > There seems to be an inconsistency between release 4.9-RC and 5.1 ufs > > support. If I fsck the same ufs (type 1 of course) file system on > > both releases, each claims that the other has left incorrect > > summary data in the superblock. Presumably only one can be correct. > > I just don't know which to blame. > > ... > > There is no problem AFAIK, you just have to fsck with the matching > executable. A lot has changed with FreeBSD 5, spend some time with the > -current archive and you will learn more. I'm sure you noticed how your > findings are consistently inconsistent. Thanks for the pointer. I eventually found at least part of the discussion in the -current archive. I interpret the discussion as follows: The 5.x UFS1 file system turns out to be slightly incompatible with earlier UFS file systems. The problem is only that it keeps the summary data in a different location in the superblock, but that is sufficient to make the file systems incompatible. There seems to be no interest in making them compatible. Suggestion: if FreeBSD 5 used a different clean flag and FreeBSD 4/5 always cleared the other's clean flag whenever they rewrote a superblock, the file systems would automatically be refscked whenever you switched between operating systems but not after a normal reboot. Dan Strick strick@covad.net