How to copy KVM disk image to LVM
Solution 1:
You may simply have an off-by-one math error:
3146776576 (size, in bytes of your .raw file) / 1024 (kb) / 1024 (mb) == 3001MB
But you made your LV exactly 3000MB ?
There's nothing wrong with DD'ing one partition onto another. Even though your vmbuilder partition list added up to 3000, your .qcow file is a hard drive image, which includes a partition table + mbr @ the front of the disk.