Dear All, I've installed CentOS5 and configured the system with Xen+LVM All guest domain are installed in logical volume, lvm-backed vbd. and the guest domain will also use lvm too. My example. 1. Install centos5 with software raid (raid 1) 2. create pv, vg, lv on the md device 3. install guest domain (centos5) in one of the lv '/dev/VolGroup00/xen2vbd1' 4. the guest domain also use lvm, vg 'Xen1Vbd1VG00' created within the guest domain. I can get the guest domain up and run correctly. and able to clone the guest domain by adding new lv and using dd dd if=/dev/VolGroup00/xen2vbd1 of=/dev/VolGroup00/xen2vbd2 Then, i have several guest domain with same data. After several add/delete action of the lv under domain-0 for testing and cloning guest domain. I got the following error: [root@xen2 ~]# pvs Couldn't find device with uuid '0gmklZ-HcGJ-Asv1-pkQz-guhK-bbY4-MJ24nq'. Couldn't find device with uuid '0gmklZ-HcGJ-Asv1-pkQz-guhK-bbY4-MJ24nq'. Segmentation fault [root@xen2 ~]# lvs Couldn't find device with uuid '0gmklZ-HcGJ-Asv1-pkQz-guhK-bbY4-MJ24nq'. Couldn't find all physical volumes for volume group Xen1Vbd1VG00. Couldn't find device with uuid '0gmklZ-HcGJ-Asv1-pkQz-guhK-bbY4-MJ24nq'. Couldn't find all physical volumes for volume group Xen1Vbd1VG00. Volume group "Xen1Vbd1VG00" not found LV VG Attr LSize Origin Snap% Move Log Copy% LogVol00 VolGroup00 -wi-ao 14.62G xen2vbd1 VolGroup00 -wi-a- 8.00G xen2vbd2 VolGroup00 -wi-a- 8.00G Any one face the similar error? and why lvm see the logical volume as a physical volumes? or I should not use lvm in guest domain if i use lvm-backed vbd for xen? Thanks. Achievement _________________________________________________________________ Messenger 的 PC - to - PC 直接對話功能,跟海外親友免費講長途電話,慳錢方便 — Messenger PC - to - PC 直接對話 http://get.live.com/messenger/features _______________________________________________ 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/