Hi, every lvm command gives one line with: /dev/cdrom: open failed: No medium found I looked at https://bugzilla.redhat.com/show_bug.cgi?id=431901 and changed filter in /etc/lvm/lvm.conf to filter = [ "r|/dev/cdrom|", "a/.*/" ] then deleted cache /etc/lvm/cache/.cache This seems to help, but after a while the message reappears. Is there a way to get rid of it, because I'm making use of lvm with snapshots very often? Rainer