Hi, I am new to LVM2, it is quite possible that I missed some steps. I created an lv using the command: dd if=/dev/zero of=/dev/sde bs=1k count=1 blockdev --rereadpt /dev/sde pvcreate -v /dev/sde ... repeat for 27 disks vgcreate v_db /dev/sde/ /dev/sdf /dev/sde ... 27 disks lvcreate -i27 -I512 -L 100G -n lv_dbt3 v_db The first time everything is fine. To test another linux kernel, I re-imaged the whole system and rebooted. But when I try to create lv, it complains Couldn't find device with uuid ... pvdata -p /dev/sde --- NEW Physical volume --- PV Name /dev/sde VG Name PV Size 0 [0 secs] PV# 0 PV Status NOT available Allocatable NO Cur LV 0 PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID none lvmdiskscan shows: /dev/sde [ 16.95 GB] LVM physical volume Do I have to remove the lv and vg before I re-image the system? What can I do now? TIA, Jenny _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/