In step #3 on the Provisioning Storage page, we tell users to run the following command: mdadm --examine --scan /etc/mdadm.conf I believe it should actually read: mdadm --examine --scan > /etc/mdadm.conf which would create mdadm configuration to force the name to /dev/md0 as created.
RH VSA User Guide has been updated and re-published.(http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Virtual_Storage_Appliance/3.2/html/User_Guide/chap-User_Guide-Provisioning_Storage.html)