Storage vMotion is wonderful but vMotion isn’t available without vCenter. bah!

This was a handy guide:

  1. Enable SSH to the host.
  2. Browse to the VM: cd /vmfs/volumes/<datastore>/<vm>
  3. Create a thin version of the .vmdk: vmkfstools -i d <vhdd>.vmdk -d thin <vhdd>-thin.vmdk
  4. Remove the thick .vmdk
  5. Attach the thin .vmdk
  6. Delete the old .vmdk and *-flat.vmdk