From owner-freebsd-current Fri Nov 29 9: 9:20 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A37C937B401 for ; Fri, 29 Nov 2002 09:09:18 -0800 (PST) Received: from MX2.estpak.ee (ld1.estpak.ee [194.126.101.98]) by mx1.FreeBSD.org (Postfix) with ESMTP id A63EF43EBE for ; Fri, 29 Nov 2002 09:09:17 -0800 (PST) (envelope-from kalts@estpak.ee) Received: from tiiu.internal (80-235-35-96-dsl.mus.estpak.ee [80.235.35.96]) by MX2.estpak.ee (Postfix) with ESMTP id 4CA2E735CC for ; Fri, 29 Nov 2002 19:08:17 +0200 (EET) Received: from tiiu.internal (localhost [127.0.0.1]) by tiiu.internal (8.12.6/8.12.6) with ESMTP id gATH9FoE002760 for ; Fri, 29 Nov 2002 19:09:15 +0200 (EET) (envelope-from vallo@tiiu.internal) Received: (from vallo@localhost) by tiiu.internal (8.12.6/8.12.6/Submit) id gATH9Fwj002759 for current@freebsd.org; Fri, 29 Nov 2002 19:09:15 +0200 (EET) (envelope-from vallo) Date: Fri, 29 Nov 2002 19:09:15 +0200 From: Vallo Kallaste To: current@freebsd.org Subject: Re: Harry Potter and the Disappearing Disklabel Message-ID: <20021129170915.GB2400@tiiu.internal> Reply-To: kalts@estpak.ee References: <20021129093417.V7358-100000@volatile.chemikals.org> <20021129164548.GA2400@tiiu.internal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20021129164548.GA2400@tiiu.internal> User-Agent: Mutt/1.5.1i-ja.1 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, Nov 29, 2002 at 06:45:48PM +0200, Vallo Kallaste wrote: > > I've seen one post similar to this, but not much else. I think maybe the > > UFS2 problem had to do with Kirk's recent changes, but the disklabel > > issue... I'm wary to reboot my machine! What in the hell could be causing > > this? I'm tempted to point the finger at GEOM, but hate to say anything > > like that. > > Same here today. I had system from Nov 21, both world and kernel. > Did buildworld, installworld and then rebooted with old 21Nov > kernel. At boot fsck whined about /usr (ad0s1d) partition and died > with incorrect superblock message leaving the system in single user. > The /usr partition has UFS2 filesystem. Why the partition had to be > fsck'ed? The system went down cleanly after build-installworld. > I tried to fsck_ffs -b 32 /usr but it didn't like it either and died > with signal 8. Floating point exception. I know the next alternate > superblock _is_ there at 32, because I converted /usr to UFS2 only > few days ago and remember the newfs command exactly. > After the failed attempt of fsck_ffs -b 32 suddenly some fragment of > recent -current talk popped in my mind and I remember there was talk > about mount command doing some trickery. So I went with > mount -t ufs -f /dev/ad0s1d /usr and voila the data was there. > I'm almost sure that I can reproduce it, because I have the / and > /usr dumps from the time I did UFS2 converting and the live-current > cd burnt for this purpose (JPSNAP). It's possible to go back in time > and fully restore the system as it were before. One thought about the initial fsck issue. The system uptime was 8 days and almost all the time it did compilation/clearing up of my workstation bundle port (~100 individual port). I did it because of stability issues before, to control the kernel with only DISABLE_PSE enabled. Because space in /usr is limited on this system, the /usr/ports is mounted over ro NFS, but WRKDIRPREFIX, DISTDIR and PACKAGES are set to local filesystem, so /usr periodically filled up to ~95% and drained quickly (several concurrent rm -rf's) to 30%. This is quite a stress to softupdates and filesystem in general, so if there's a bug this explains the need for fsck after boot. Just a thought. -- Vallo Kallaste kalts@estpak.ee To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message