Power saving during open block read with large block openness

A controller in communication with a memory apparatus that has a plurality of blocks including memory cells that are disposed in memory holes and are each connected to one of a plurality of word lines and configured to retain a threshold voltage corresponding to one of a plurality of data states and being operable in one of a first read condition in which a word line voltage of the plurality of word lines is discharged and a second read condition in which the word line voltage of the plurality of word lines is coupled up to a residual voltage level, the controller configured to:

• instruct the memory apparatus to program the memory cells in a program operation;
• determine specific ones of the plurality of word lines based on a quantity of the plurality of word lines connected to the memory cells of each of the plurality of blocks that are programmed;
• following programming of the memory cells connected to the specific ones of the plurality of word lines, instruct the memory apparatus to apply a predetermined dummy read voltage to the specific ones of the plurality of word lines during a dummy read operation to maintain the memory cells connected thereto in the second read condition, the specific ones of the plurality of word lines determined based on an amount of the memory cells that are programmed.