The Tails LV backup routine [mounts LV snapshots as read only](https://gitlab.torproject.org/tpo/tpa/puppet-borgbackup/-/blob/cb9eb71c33252ab0ef629855367b975428d12269/files/runbackuplv.sh#L53) in the Libvirt host, which causes alerts of the kind: ``` description: On host lizard.tails.net the filesystem contained in device /dev/mapper/lizard-isos--backup is set to readonly, preventing any writes from happening. ``` We shouldn't be alerted as that is the expected behavior of the backup routine.