Older servers
Servers that have been upgraded have:
grep quota /etc/fstab
/dev/xvda3 /home ext3 nodev,nosuid,quota 0 1
Whereas newer ones have:
grep quota /etc/fstab
/dev/xvda4 /home ext4 nodev,nosuid,quota,usrjquota=aquota.user,jqfmt=vfsv0 0 1
The older ones don't work with this role at the moment.