[This is preliminary documentation and subject to change.]
The administrator can set quotas for specific users on a volume. The administrator can also set default quotas for the volume. A new user on the volume receives the default quota unless the administrator established a quota specifically for that user.
The administrator can query the level of quota tracking, the default quota limits, and the per-owner quota information. The per-user quota information contains the user's hard quota limit, warning threshold, and the quota usage.