From owner-freebsd-questions Thu Sep 5 7:43:18 2002 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 1200C37B400 for ; Thu, 5 Sep 2002 07:43:15 -0700 (PDT) Received: from rhadamanth.submonkey.net (pc1-cdif1-6-cust12.cdf.cable.ntl.com [80.3.230.12]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1AECA43E3B for ; Thu, 5 Sep 2002 07:43:14 -0700 (PDT) (envelope-from setantae@submonkey.net) Received: from setantae by rhadamanth.submonkey.net with local (Exim 4.10) id 17mxqh-0003jJ-00; Thu, 05 Sep 2002 15:43:11 +0100 Date: Thu, 5 Sep 2002 15:43:11 +0100 From: Ceri Davies To: Lowell Gilbert Cc: freebsd-questions@freebsd.org Subject: Re: mount(8) mount_union(8) and the slippery wet floor... Message-ID: <20020905144311.GA13872@submonkey.net> Mail-Followup-To: Ceri Davies , Lowell Gilbert , freebsd-questions@freebsd.org References: <5.1.0.14.0.20020904132723.00bc28e8@mail.lusidor.nu> <20020904124832.GA15994@submonkey.net> <44y9ahecn2.fsf@be-well.ilk.org> <20020905091754.GE10717@freepuppy.bellavista.cz> <44bs7c1phq.fsf@be-well.ilk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <44bs7c1phq.fsf@be-well.ilk.org> X-message-flag: All your linuxconf-configured redhat are belong to us. User-Agent: Mutt/1.5.1i Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, Sep 05, 2002 at 10:26:57AM -0400, Lowell Gilbert wrote: > Roman Neuhauser writes: > > # freebsd-questions-local@be-well.no-ip.com / 2002-09-04 16:13:53 -0400: > > > Ceri Davies writes: > > > > On Wed, Sep 04, 2002 at 01:46:42PM +0200, Jimmy Lantz wrote: > > > > > > > > > > Is the mount union mentioned in MOUNT(8) also affected by the > > > > > slippery wet floor in MOUNT_UNION(8)?? > > > > > Or can I safely use the mount with the option union? > > > > > > > > They are the same thing. > > > > > > For the record, they are *not* the same thing. > > > > could you elaborate? > > I'm not 100% sure that I completely understand the technical details, > but I'll give it a shot. You could go check the archives of the > freebsd-fs list for more authoritative information on the subject. It's a fair cop. For the sake of the list, here are the results of my experiments with this. # mount -o union /dev/ad6s2f /tmp/mnt/ results in : /dev/ad6s2f on /tmp/mnt (ufs, local, union, soft-updates) while: # mount -t union /usr/obj /tmp/mnt2/ results in: :/usr/obj on /tmp/mnt2 (union, local, noclusterw) Yes, they're different. Yes, they do the same thing. Yes, Lowell was right, and I'll never doubt it again. Ceri -- you can't see when light's so strong you can't see when light is gone To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message