Using, Configuring, and Managing NTFS Disk Quotas
Windows Server 2008 supports two different types of disk quotas:
NTFS disk quotas. NTFS disk quotas are supported with all versions of Windows Server 2008 and allow you to manage disk space usage by users. You configure quotas on a per-volume basis. Although users who exceed limits will see warnings, administrator notification is primarily through the event logs.
Resource Manager disk quotas. Resource Manager disk quotas are supported in Windows Server 2008 and allow you to manage disk space usage by folder and by volume. Users who are approaching or have exceeded a limit can be automatically notified by e-mail. The notification system also allows for notifying administrators by e-mail, triggering ...