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Engineering has informed me that they are not fixing this issue in 6.4
Adding a note in the manual, but it won't fix the actual problem

Added a note in the relevant chapter
will supply build when it is brewed

Fixed in build 11-12
The stage is not refreshing properly

see the admonition 
http://documentation-devel.engineering.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/V2V_Guide/chap-V2V_Guide-P2V_Migration_Converting_Physical_Machines_to_Virtual_Machines.html
this was confirmed by Matthew Booth

Checked v2v guide,there are already contents about this issue included:

"A number of operating systems can be converted from physical machines to virtual machines, but be aware that there are known issues converting physical machines using software RAID. Red Hat Enterprise Linux 6 machines with a filesystem root on a software RAID md device may be converted to guest virtual machines. Red Hat Enterprise Linux 4 and Red Hat Enterprise Linux 5 guest virtual machines with their filesystem root on a software RAID md device cannot be converted to virtual machines. There is currently no workaround available."

So change the status of the bug to VERIFIED.

closed - this fix is included in the RHEL 6.4 release