From owner-freebsd-questions Mon Jul 22 11: 0:45 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 9436237B407 for ; Mon, 22 Jul 2002 11:00:38 -0700 (PDT) Received: from mail.liwing.de (mail.liwing.de [213.70.188.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id 78AA243E65 for ; Mon, 22 Jul 2002 11:00:37 -0700 (PDT) (envelope-from rehsack@liwing.de) Received: (qmail 74809 invoked from network); 22 Jul 2002 18:10:45 -0000 Received: from stingray.liwing.de (HELO liwing.de) ([213.70.188.164]) (envelope-sender ) by mail.liwing.de (qmail-ldap-1.03) with SMTP for ; 22 Jul 2002 18:10:45 -0000 Message-ID: <3D3C47A0.F285FB8F@liwing.de> Date: Mon, 22 Jul 2002 19:57:52 +0200 From: Jens Rehsack Organization: LiWing IT-Services X-Mailer: Mozilla 4.78 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: "Brian T. Schellenberger" Cc: Philip Hallstrom , freebsd-questions@FreeBSD.ORG Subject: Re: If a disk is mounted read only is it possible to corrupt it? References: <20020719132123.F60588-100000@cypress.adhesivemedia.com> <3D3BDD27.8152AA0B@liwing.de> <200207220916.48028.bts@babbleon.org> Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit 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 "Brian T. Schellenberger" wrote: > > On Monday 22 July 2002 06:23 am, Jens Rehsack wrote: > | Philip Hallstrom wrote: > | > Hi all - > | > This seems like an obvious answer, but I didn't see anything in > | > the man pages or the FQ so... > | > > | > If I mount *all* of my partitions as read only (ignoring the problems of > | > needing to write log files, etc. for now) and then cut the power to the > | > server, is there any chance of corrupting the disk? It seems that > | > FreeBSD wouldn't do it, but would the disk itself do it? > | > | That depends on the disk you're using. If you have problem with your > | power supply, you should better think 'bout an uninterruptable power > | supply. > > Unless there is a power surge or physical trauma, a disk most certainly should > not be capable of "self-corrupting" unless a write has been issued, and if > they are mounted r/o then FreeBSD will never issue a write. I meant really old disks (we have some "gaming" machines with such disks) which are not able to do an auto park, etc. Such a disk could loose control over it's r/w head and physically corrupts magnetic particles on the disk surface. That's what I meant - sorry for to black writing. > -- > Brian, the man from Babble-On . . . . bts@babbleon.org (personal) > http://www.babbleon.org > > http://www.eff.org http://www.programming-freedom.org -- L i W W W i Jens Rehsack L W W W L i W W W W i nnn gggg LiWing IT-Services L i W W W W i n n g g LLLL i W W i n n g g Friesenstraße 2 gggg 06112 Halle g g g Tel.: +49 - 3 45 - 5 17 05 91 ggg e-Mail: Fax: +49 - 3 45 - 5 17 05 92 http://www.liwing.de/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message