VM imported with a raw sparse disk to a block domain succeeded. VM was started without any issue. Verified on rhev-3.4.1-av11.1
CORRECTION: Verified using rhev3.4.2 av11.1
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2014-1161.html