Apparatus having an array of memory cells and a differential storage array might have a controller configured to program first data to a plurality of memory cells of the array of memory cells corresponding to an address of the array of memory cells, program second data to the plurality of memory cells containing the first data, determine if a power loss to the apparatus is indicated while programming the second data, and, if a power loss is indicated, program a first plurality of differential storage devices of the differential storage array responsive to information indicative of a plurality of digits of the first data, program a second plurality of differential storage devices of the differential storage array responsive to information indicative of a plurality of digits of the address, and program a third differential storage device of the differential storage array to have a particular value.