qemu-img can convert many formats. Here is an example of how to convert different images to different formats for QEMU-KVM The example above converts a raw windows2019.img file from QEMU to a Virtualbox .vdi qemu-img convert -f raw -Ovdi windows2019.img windows2019.vdi -f raw = this means the format of the source image (instead of raw it could be vdi, vmdi, qcow2 etc..)........

In short the solution is just to use vgremove for the actual /dev/mapper device: vgremove /dev/mapper/backups-backuplv box mnt # mdadm --manage /dev/md8 --stop mdadm: Cannot get exclusive access to /dev/md8:Perhaps a running process, mounted filesystem or active volume group? box mnt # lv lvchange lvconvert lvcreate l........