The space_alloc 7-mode LUN option (space-allocation in clustered Data ONTAP) allows the storage system to notify the host when it is about to run out of space in a thin provisioned environment. When t...The space_alloc 7-mode LUN option (space-allocation in clustered Data ONTAP) allows the storage system to notify the host when it is about to run out of space in a thin provisioned environment. When the option is enabled, the storage system notifies the host through special SCSI responses when the space is out or nearly out. In addition, once a fully out of space condition exists for the volume containing the LUN, the LUN is left online with this option enabled.
