What logical space enforcement does

When the logical space enforcement feature is enabled, ONTAP counts the number of used blocks in a volume to determine the amount of logical available space that is still available in that volume. If there is no logical space available in a volume, the system returns an ENOSPC (out-of-space) error message.

Logical space enforcement ensures that users are notified when a volume is full or nearly full. Beginning with 9.5, ONTAP returns three types of alerts when the logical space enforcement feature is enabled to inform you about the available space on a volume: