Verified and works fine with 3.1.0-0.62.el6 With this build there is a new column called Space Used in the volumes tab with a progress bar which indicates how much percent of volume is full. Mouse hovering on that gives you the information about Free, used and Total available space. There is another field called capacity in the general sub tab of volume which displays Capacity : Total,used, free. The capacity trending graph is available if integrated with Nagios.
Sahina, Could you review and sign-off the edited doc text.
from a single pane --> from volumes view ? otherwise looks good
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. https://rhn.redhat.com/errata/RHEA-2015-1494.html