When create account with DirectAdmin, it return with quota not set up.
nano /etc/fstab
# Device Mountpoint FStype Options Dump Pass#
/dev/ad0s1a / ufs rw,userquota,groupquota 1 1
Add rw to the line and run quotacheck program from redhad with command below:
/sbin/quotaoff -a; /sbin/quotacheck -avugm; /sbin/quotaon -a;
Then run command below to pull data from quotacheck to directadmin quota usage
echo "action=tally&value=all" >> /usr/local/directadmin/data/task.queue
Detail reference: http://help.directadmin.com/item.php?id=42