You are certainly right. However, I have no clue what to do. The pvcreate was a hint given on the lvm pages at redhat. It should only have overwritten the UUID in the metadata, nothing else. Recreation of the volume group seemed a good idea as I only had one volume group on the pv and therefore I did not see how this could have destroyed anything. The (human-readable) data at the beginning of the device /dev/md127 is still there and does display the same information. Please see my posting on ubuntuforums for more details. Did you look that up? Do you have any idea what I can do? I am anyways prepared to give up in the foreseeable future. This would be a major blow to me, this computer contained a lot of old programs and information - but as it goes, I never looked up most of it. There are some programs on which I was working at the moment, loss of those would be my major inconvenience at the moment. But as my data recovery attempts seem to go nowhere, I will have to stop trying some day. On Mar 25, 2013, at 21:36 , Stuart D Gathman <stuart@bmsi.com> wrote: > Long ago, Nostradamus foresaw that on 03/25/2013 04:25 PM, Björn > Nadrowski would write: >> >> I did recreate the physical volume and the volume group using pvcreate and vgcreate, please see the description of the problem >> on ubuntuforums for further details. >> > That was not a good idea. You've now written over the major clue to > what happened. Examining the beginning of the PV for the metadata - > perhaps offset or scrambled because of some inadvertent change to the > raid10 parameters - should have been your major priority! > > Theory 2: the md driver on the knoppix CD is an earlier version that > puts metadata at the end of the volume, instead of at the beginning. > This would change the offsets of your metadata and extents. It would > not see the newer md raid metadata, and create a new drive. I'm not > sure if this theory is consistent with your history. > > I *strongly* advise not doing any more writing to this device until you > know *exactly* what happened. > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
