To delete the directory quotas for all directories on an NSS volume without dealing individually with each directory, you can simply disable the Directory Quotas attribute for the NSS volume.
In iManager, click Storage > Volumes.
Select a server to manage.
In the Volumes list, select a volume that you want manage.
Click Properties.
The Properties page has three tabs: Attributes, Statistics, and Quota Usage. It opens to the Attributes tab.
On the Attributes tab, deselect the Directory Quotas check box, then click Apply.
Restart NCP2NSS by entering the following at a terminal prompt:
/etc/init.d/ncp2nss restart