Hello List, Our user is using lvm2-2.02.180, he attempted to remove a snapshot LV, but failed with the below error, lvremove /dev/evg00/snap_var WARNING: Failed to connect to lvmetad. Falling back to device scanning. Do you really want to remove active logical volume evg00/snap_var? [y/n]: y device-mapper: reload ioctl on (254:36) failed: Invalid argument Failed to refresh var without snapshot. But I can not reproduce in local, how do I find the root cause behind this problem? I also can see one related error message in /var/log/messages Jun 12 09:00:22 gtunxlnb04864 sudo: buss18 : TTY=pts/0 ; PWD=/PZIR/users/buss18 ; USER=root ; COMMAND=/sbin/lvremove /dev/evg00/snap_opt Jun 12 09:00:22 gtunxlnb04864 sudo[25821]: pam_unix(sudo:session): session opened for user root by buss18(uid=0) Jun 12 09:00:22 gtunxlnb04864 kernel: [1492631.077551] device-mapper: ioctl: can't change device type after initial table load. <<== here Jun 12 09:00:22 gtunxlnb04864 sudo[25821]: pam_unix(sudo:session): session closed for user root Jun 12 09:01:01 gtunxlnb04864 cron[25932]: pam_unix(crond:session): session opened for user ggmonux1 by (uid=0) Thanks Gang _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/