Upstream patch: http://gerrit.ovirt.org/12979
Verified as fixed in Red Hat Enterprise Virtualization Manager Version: 3.2.0-10.20.master.el6ev. For a volume in a 3.1 cluster, the Advanced Brick Details dialog box displays the following message - Brick Details not supported for this Cluster's compatibility version(3.1). For a volume in a 3.2 cluster, the brick details are now being displayed.
3.2 has been released