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/