The wafl scan status command reports a block ownership calculation scanner and the storage system experiences a slight to extreme performance issue when this command is run. One of these is called ' b...The wafl scan status command reports a block ownership calculation scanner and the storage system experiences a slight to extreme performance issue when this command is run. One of these is called ' block ownership scanner '. When the snapshot delete command is run through CLI or some other form, or another snapshot operation is ran, WAFL runs the ' block ownership calculation ' scanner to obtain an approximation of block ownership changes.