From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Heinz J . Mauelshagen" Subject: Re: [linux-lvm] Advice needed: vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of volume group "vg0" from physical volume(s) Message-ID: <20021119113149.A30328@sistina.com> References: <200211190903.gAJ93mM15712@batty.ecr.mu.oz.au> Mime-Version: 1.0 In-Reply-To: <200211190903.gAJ93mM15712@batty.ecr.mu.oz.au>; from longi@batty.ecr.mu.oz.au on Tue, Nov 19, 2002 at 08:03:48PM +1100 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: Tue Nov 19 04:38:02 2002 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Tue, Nov 19, 2002 at 08:03:48PM +1100, James Longworth wrote: > Hi, > > I got your email address from the LVM man pages, hopefully I'm emailing > the right person. > > I have an LVM device that has lost its LVM data. James, how did that happen ? Accidential overwrite or something (i.e. written an MBR) ? > > The error I'm getting is vgscan -- ERROR "vg_read_with_pv_and_lv(): > current PV" can't get data of volume group "vg0" from physical volume(s) > > I haven't tried recreating any of the devices because I didn't want to > risk overwriting any data on the disks. > > Can you point me at some documentation on rescuing an LVM partition, or > if you have time, possibly give me some advice on where to start? Use vgcfgrestore (presuming that /etc/lvmconf/vg0.conf still exists) to restore the metadata to the physical volume(s). First of all, please save all the hopefully still existing rest of the LVM metadata by "dd if=/dev/YourPV of=YourPV.vgda bs=1k count=4k" and copy that to backup media. Insert _all_ your physical volume device pathes (i.e. /dev/hdb1) in sequence for "YourPV". To list which ones that were (presumably _no_ hardware reconfiguration happend): # vgcfgrestore -ll -n vg0 -f /etc/lvmconf/vg0.conf Do the actual restore: # pvcreate -ff /dev/YourPV # vgcfgrestore -n vg0 -f /etc/lvmconf/vg0.conf /dev/YourPV # vgscan # vgchange -ay No you volume group should be back to life. If more than just the LVM metadata area at the beginning of a PV has been overwritten, you'll loose data (filesystem or whatever is in logical volumes) too :( > > It would be greatly appreciated. > > James > > -- > James Longworth > longi@unimelb.edu.au > (03) 8344-3361 > "Working for Melbourne University gives people real incentives to want > things that nobody else wants." -- Apologies to Andy Warhol. > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- 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 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-