1. A storage device comprising: a storage array including a plurality of storage elements, each storage element operable to be written to one of a discrete set of physical states; a read circuit for selecting one or more storage elements and generating, for each selected storage element, an analog signal representative of the physical state of the selected storage element; and an analog signal processing circuit for processing the analog signal to generate a plurality of outputs, each output representing a degree of an association of the selected storage element with a different subset of one or more of the discrete set of physical states.