1. A method of operating a flash device ( 100 ), comprising; programming a portion of or an entire of the flash device on a basis of a single program and erase entity ( 402 ), the single program and erase entity comprising two adjacent dual bit physical memory cells ( 404 , 406 ) of the flash device as a single logical cell; and erasing the portion of or the entire of the flash device on the basis of the single program and erase entity.