This is how to create a sparse file dump from a block device:
cp --sparse=always <(dd if=/dev/vg0/vmservice1 bs=8M iflag=direct | pv -pre --size=20G) /opt/backups/vmservice1.dat
This is how to create a sparse file dump from a block device:
cp --sparse=always <(dd if=/dev/vg0/vmservice1 bs=8M iflag=direct | pv -pre --size=20G) /opt/backups/vmservice1.dat