From owner-freebsd-questions@FreeBSD.ORG Mon Jul 4 19:43:44 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5CFA81065673 for ; Mon, 4 Jul 2011 19:43:44 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (smtp6.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3fd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id BA7B78FC0A for ; Mon, 4 Jul 2011 19:43:43 +0000 (UTC) Received: from seedling.black-earth.co.uk (seedling.black-earth.co.uk [81.187.76.163]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id p64JhUIQ049912 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Mon, 4 Jul 2011 20:43:40 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.8.3 smtp.infracaninophile.co.uk p64JhUIQ049912 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infracaninophile.co.uk; s=201001-infracaninophile; t=1309808620; bh=GfhgOotdHFwPiNonj5o26n1dfT+rcLXqip4aYHj0IFI=; h=Message-ID:Date:From:MIME-Version:To:CC:Subject:References: In-Reply-To:Content-Type:Cc:Content-Type:Date:From:In-Reply-To: Message-ID:Mime-Version:References:To; z=Message-ID:=20<4E1217DB.1090809@infracaninophile.co.uk>|Date:=20M on,=2004=20Jul=202011=2020:43:23=20+0100|From:=20Matthew=20Seaman= 20|User-Agent:=20Mozilla/5.0=20(M acintosh=3B=20Intel=20Mac=20OS=20X=2010.6=3B=20rv:5.0)=20Gecko/201 10624=20Thunderbird/5.0|MIME-Version:=201.0|To:=20tethys=20ocean=2 0|CC:=20freebsd-questions@freebsd.org|Subj ect:=20Re:=20mount=20/unmount|References:=20=20<4E11C059.30907 08@infracaninophile.co.uk>=20|In-Reply-To:=20|X-Enigmail-V ersion:=201.2|OpenPGP:=20id=3D60AE908C|Content-Type:=20multipart/s igned=3B=20micalg=3Dpgp-sha1=3B=0D=0A=20protocol=3D"application/pg p-signature"=3B=0D=0A=20boundary=3D"------------enig81A417D03DA005 E951662DC8"; b=LiJr+J/8YXvPJuxWosaTkPrNDQmxHSlrkarA7ypfJVkJVUoCBR1bH8rbZYoD/q8aN vdt7X2MSRGeigAf5oNl4P5Qkp/EMCLvTz54G0RvyRoE0w+0GcjmRgnur6T7MH8Q5fH blW82xTRPdB6V+Z1gu3ZI1WC68fMJGiRstOJz0cA= Message-ID: <4E1217DB.1090809@infracaninophile.co.uk> Date: Mon, 04 Jul 2011 20:43:23 +0100 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0) Gecko/20110624 Thunderbird/5.0 MIME-Version: 1.0 To: tethys ocean References: <4E11C059.3090708@infracaninophile.co.uk> In-Reply-To: X-Enigmail-Version: 1.2 OpenPGP: id=60AE908C Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig81A417D03DA005E951662DC8" X-Virus-Scanned: clamav-milter 0.97 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,SPF_FAIL autolearn=no version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Cc: freebsd-questions@freebsd.org Subject: Re: mount /unmount X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jul 2011 19:43:44 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig81A417D03DA005E951662DC8 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 04/07/2011 15:53, tethys ocean wrote: >> If a partition was not unmounted cleanly (eg. the machine crashed, or >> > the power was cut off suddenly) then fsck(8) should be used to check= and >> > fix any problems on the filesystem. If you've booted into single-us= er >> > mode, then definitely fsck any partitions before trying to mount the= m. >> > > *I guess If I can do fsck without unmount partition I can lost all my d= ata > isn't it?* fsck on an unmounted partition will change on-disk data structures in ways that the kernel doesn't expect. So, yes, one consequence is that you can lose or corrupt data. You probably wouldn't lose everything in the partition -- but you would tend to cause corruption predominantly in files that are more actively used. So don't do that. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate JID: matthew@infracaninophile.co.uk Kent, CT11 9PW --------------enig81A417D03DA005E951662DC8 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk4SF+IACgkQ8Mjk52CukIx+XACgjqGCxbZtQvU1zt13rrBYEOMT EREAnjpj7abxJXlJCm9wDLP7tBHCqqEw =hOdF -----END PGP SIGNATURE----- --------------enig81A417D03DA005E951662DC8--