Identifying asynchronous power loss

An apparatus, comprising:

• an array of memory cells;
• a controller to perform access operations on the array of memory cells;
• and
• an energy storage device configured to store energy from a power supply;
• wherein the controller is configured to:
• iteratively program a page of memory cells of the array of memory cells to respective desired data states as part of a programming operation on the array of memory cells, wherein a particular memory cell of the page of memory cells is configured to store overhead data and a different memory cell of the page of memory cells is configured to store user data;
• determine whether a power loss to the apparatus from the power supply is indicated while iteratively programming the page of memory cells to the respective desired data states;
• and
• if a power loss to the apparatus is indicated while iteratively programming the page of memory cells to the respective desired data states, change the desired data state of the particular memory cell before continuing with iteratively programming the page of memory cells to the respective desired data states while receiving power from the energy storage device.

A method of operating an apparatus, comprising:

• iteratively programming a group of memory cells to respective interim desired data states, wherein a particular memory cell of the group of memory cells is configured to store overhead data and a different memory cell of the group of memory cells is configured to store user data;
• after iteratively programming the group of memory cells to the respective interim desired data states, iteratively programming the group of memory cells to respective subsequent desired data states;
• determining whether a power loss to the apparatus is indicated while iteratively programming the group of memory cells to the respective subsequent desired data states;
• and
• if a power loss to the apparatus is indicated while iteratively programming the group of memory cells to the respective subsequent desired data states, changing the subsequent desired data state of the particular memory cell before continuing with iteratively programming the group of memory cells to the respective subsequent desired data states.

A method of operating an apparatus, comprising:

• reading a data state of a particular memory cell of a last written page of memory cells of a block of memory cells;
• determining whether the data state of the particular memory cell is an erased data state;
• determining that the page of memory cells was programmed normally if the data state of the particular memory cell is the erased data state;
• and
• marking the page of memory cells as affected by power loss during a programming operation of the page of memory cells if the data state of the particular memory cell is not the erased data state.

An apparatus, comprising:

• an array of memory cells;
• and
• a controller to perform access operations on the array of memory cells;
• wherein the controller is configured to:
• read a data state of a particular memory cell of a last written page of memory cells of a block of memory cells of the array of memory cells;
• determine whether the data state of the particular memory cell is an erased data state;
• determine that the page of memory cells was programmed normally if the data state of the particular memory cell is the erased data state;
• and
• mark the last written page of memory cells as affected by power loss during a programming operation of the last written page of memory cells if the data state of the particular memory cell is not the erased data state.