System and method which compares data preread from memory cells to data to be written to the cells

摘要: A memory system which includes one or more arrays of cells (e.g., flash cells) organized into sets cells, wherein each set is indicative a stored data, and the also circuitry compares new data (to be written to with (preread from corresponding prevents write array if identical computer including such system, method implemented by system. In preferred embodiments, controller logic performs comparison. response comparison determining that previously generates confirmation signal indicating has been array, rather than actually writing array. Preferably, emulates magnetic disk drive sufficient capacity store same amount as can conventional drive. rows columns capable storing sector data.