dd if=/dev/vg_kvm/vsv999-03ly-o5sq7ktzgnbva56l of=/backup/data.hdd bs=512 conv=noerror,sync
qemu-img info /backup/data.hdd
image: /backup/data.hdd
file format: raw
virtual size: 50G (53687091200 bytes)
disk size: 50G

guestmount -a /backup/data.hdd -i --ro /mnt
ls -la /mnt