From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3E651551.6030904@stamppot.demon.nl> From: Sander Alberink MIME-Version: 1.0 Subject: Re: [linux-lvm] Severe problem: data lost while adding a partition References: <3E3C62E4.7030409@home.nl> <20030203113148.B8501@sistina.com> <3E42D82B.3070003@stamppot.demon.nl> <20030207152736.C27442@sistina.com> <3E515E16.8050209@stamppot.demon.nl> <264070000.1045520730@[192.168.200.4]> <3E5BF188.6000207@stamppot.demon.nl> In-Reply-To: <3E5BF188.6000207@stamppot.demon.nl> Content-Transfer-Encoding: 7bit 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 Mar 4 15:07:02 2003 List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-lvm@sistina.com Hello all, Sorry to reply to myself, but I really am stuck on this one. Any pointers would be much appreciated... I have gotten the vgcreate to work (this was caused by me now using devfs (so I need to supply DevFS filenames). I also executed an lvcreate -l 399 (which was the maximum number of PE's available) on the resulting volume group. However, I cannot mount the resulting logical volume. It used to contain a reiserfs filesystem, a reiserfsck --check yields no errors, but I am unable to mount the filesystem. I am getting rather lost now..... Hope someone can help! Best regards, Sander Sander Alberink wrote: > Hi all, > > Thanks for the reply. At the moment I have re-initialized the PV's via > pvcreate -ff. However, trying to reconstruct a new volume group yields > me the following output: > > # vgcreate -v home /dev/hda[1,4,6,7] > vgcreate -- checking volume group name > vgcreate -- checking volume group directory existence > vgcreate -- locking logical volume manager > vgcreate -- checking volume group "home" existence > vgcreate -- counting all existing volume groups > vgcreate -- reading all physical volume data from disks > vgcreate -- checking if all given physical volumes in command line are > new > vgcreate -- checking physical volumes name "/dev/hda1" > vgcreate -- checking physical volumes name "/dev/hda4" > vgcreate -- checking physical volumes name "/dev/hda6" > vgcreate -- checking physical volumes name "/dev/hda7" > vgcreate -- no valid physical volumes in command line > # > > So apparently something is not OK. But what can that be? Any pointers > would be appreciated! > >>> I really appreciate your help in this. However, I am rather >>> reluctant to >>> dive in and be hasty in my commands. I really don't want to destroy my >>> data.... As I understand it, pvcreate -ff would re-initialize the >>> physical volume. As I understand it, I will have to add them to a >>> volume >>> group again. But will the filesystem still be intact after that then? >>> >>> Sorry if this sound like a beginner question to you. It very well might >>> be, but I'd rather be careful.... >> >> >> >> Thing to understand is that LVM commands update a small >> header on the phyiscal volume. You can munge the LVM >> portion without touching your data at all. In this case >> the data has no way of knowing that anything happend to >> the LVM portion of life: they live in entirely different >> parts of the disk drive. >