CentOS - Apr 2016 - journaled quotas in CentOS6?

Hi

CentOS 6.7 (kernel 2.6.32-573.el6.x86) ...

Wanted to set up group quotas on a new ext4 filesystem.  When i was 
initialising via quotacheck, received this message

     > quotacheck -vcg /HOMES
     quotacheck: Your kernel probably supports journaled quota but you 
are not using it.

I liked sound of that, so i brushed up on the procedure and modified the 
mount line in fstab to: defaults,noatime,grpjquota=aquota.group,jqfmt=vfsv0

on doing a mount /HOMES -o remount, i was met with this:

     mount: /HOMES not mounted already, or bad option

and was unable to mount the filesystem until i removed the journaling 
options

I've come across how-tos and blogs by people who were doing this in 
CentOS6.5.  The mount manpage makes no mention of jquotas

Any thoughts on how to get jquotas in 6.7?

thanks

- cal