Scenario
The export of large virtual machines from VMWare can result in multiple VMDK disk images. In order to import the VM into KVM the images need to be joined and converted to qcow2 format.
Convert VMDK to raw
qemu-img convert guest-s001.vmdk guest-s0001.raw
qemu-img convert guest-s002.vmdk guest-s0002.raw
qemu-img convert guest-s003.vmdk guest-s0003.raw
qemu-img convert guest-s004.vmdk guest-s0004.raw
qemu-img convert guest-s005.vmdk guest-s0005.raw
Concatinate raw files
cat guest-s0001.raw guest-s0002.raw guest-s0003.raw guest-s0004.raw guest-s0005.raw > guest.raw
Convert to qcow2
qemu-img convert guest.raw guest.qcow2