In some cases, cPanel may corrupt files with quota information. The effect is to display WHM accounts with quota "unlimited" and / or display the space used in cPanel as "NA"
To resolve this issue, run as root on your virtual server (OpenVZ only):
rm -f /aquota.user 2>/dev/null
rm -f /aquota.group 2>/dev/null
quotacheck -vguma
Restart server and run:
/scripts/fixquotas
