From Pulsed Media Wiki
cd /scripts/util quotaoff -av ./quotaFix.php
After a while quota has been checked and new quota files have been created, quota re-enabled.
If you get write permission error, you might need to remove aquota.* from the FS and rerun quotafix, in case of /home:
rm -rf /home/aquota.* quotaoff -av ./quotaFix.php