From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Heinz J . Mauelshagen" Subject: Re: [linux-lvm] filesystem corruption... Message-Id: <20020228100118.A25011@sistina.com> References: <224974437.20020227233630@tnonline.net> <20020227164228.A964@lynx.adilger.int> <3399590000.1014862362@tiny> <77527890.20020228065139@tnonline.net> <45423062.20020228093553@tnonline.net> MIME-Version: 1.0 In-Reply-To: <45423062.20020228093553@tnonline.net>; from andewid@tnonline.net on Thu, Feb 28, 2002 at 09:35:53AM +0100 Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Thu Feb 28 03:01:01 2002 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Thu, Feb 28, 2002 at 09:35:53AM +0100, Anders Widman wrote: > > >> On Wednesday, February 27, 2002 04:42:28 PM -0700 Andreas Dilger wrote: > > >>> On Feb 27, 2002 23:36 +0100, Anders Widman wrote: > >>>> Unfortunatley, something went seriously wrong. I can't mount the disk > >>>> any more, or use reiserfsck. They (mount/reiserfsck) say there isn't > >>>> a valid filesystem on the device. Vgscan does however find all devices > >>>> and can activate the volume group, but reiserfsck doesn't work. > >>>> > >>>> What should I do to be able to save a s much data as possible? > >>> > >>> dd if=/dev/vg/lv of=/new/disk conv=sync,noerror > > >> Then we should be able to use debugreiserfs and reiserfsck to > >> find a copy of the super in the log, or just recreate it. > > >> -chris > > > So. How much space would this require on the 'new' disk? The same > > amount as the entire LV? If that is, it would be impossible (for me, > > economically) to do this. > > > The disk with bad blocks is 80GB, and I have a "spare" 80GB disk, but > > not more. > > > //Anders > > Oh, I forgot to ask how I can recover the filsystem > header/suprtblock.. What exactly is "dd if=/dev/vg/lv of=/new/disk > conv=sync,noerror" doing to the data, except copying it to the new > device? It copies all it can read to another sane device so that youe don't loose more data if your drive turns worse. After that, you want to use "reiserfsck --rebuild-sb /dev/vg/lv". > > //Anders > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-