From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Tue, 31 Jul 2001 10:36:12 +0100 Subject: Re: [linux-lvm] Changing partition names? [vgscan not seeting PV] Message-ID: <20010731103612.B464@btconnect.com> References: Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: ; from donald@gordon.co.nz on Tue, Jul 31, 2001 at 10:06:26AM +1200 From: Joe Thornber 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: List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Tue, Jul 31, 2001 at 10:06:26AM +1200, Donald Gordon wrote: > On Tue, 31 Jul 2001, Donald Gordon wrote: > > > On Mon, 30 Jul 2001, AJ Lewis wrote: > > > > > On Mon, Jul 30, 2001 at 11:48:56PM +1200, Donald Gordon wrote: > > > > I can't seem to see any way to tell lvm that the name of one of the > > > > partitions it is using has changed (from /dev/sda10 to /dev/sda8; I'm > > > > transitioning a system to LVM). Should it pick this up on reboot or is > > > > there some config file I need to prod? > > > > > > vgscan will do this for you automatically. > > > > > > > When I (ahem) remove a partition by mistake and re-create it in the same > > location with fdisk vgscan no longer recognises it. > > I can't see anything particularily odd about this partition BTW; I'm not > sure what a LVM superblock is supposed to look like but what's there > *seems* to be likely to be something. Is the partition table supposed to > have some sort of flag in it (apart from the type=0x8e) saying "I'm an LVM > PV" or is it likely the data (my /usr and /home :( ) in the PV is gone > forever? Your data should still be there, I've done a similar thing and still managed to recover it. Just don't write anything to that device. Try experimenting with the pvdata command on your suspect partition. > > If it makes sense to anyone, the first 4kb (and 512kb is in the same > directory) of that partition is at http://fias.co.nz/lvm/sda6-4k I just had a look, it certainly doesn't look like a pv. So either the metadata got fried, in which case you should restore from a backup. Or you didn't restore the partition to the same location, in which case dump a bit more of the partition, and hunt for strings that match the names of your vg and lv's. - Joe