Memory system and method for operating the memory system
AssigneeSK hynix Inc.
InventorWon-Jin Jung
Life of this patent
Estimating the term…
Abstract
A memory system may include: a memory device including a memory cell array, the memory cell array including a plurality of scan areas, each of the plurality of the scan areas including at least two group areas, each of the group areas including a flag area storing a flag that represents whether a corresponding group area is programmed or not; and a controller suitable for requesting the memory device to read the flag of each of the group areas a flag when a sudden power-off occurs, and rebuilding at least one of the group areas when at least one of the flags is in an erase state.
Claims20
A memory system, comprising:
- a memory device including a memory cell array, the memory cell array including a plurality of scan areas, each of the plurality of the scan areas including at least two group areas, each including plural pages and a single flag area storing a flag that represents whether the plural pages of each of the group areas are programmed or not, wherein the flag is set when a program operation onto the plural pages of each of the group areas is completed;
- and
- a controller suitable for requesting the memory device to read the flag of each of the group areas after a sudden power-off occurs, searching which flag is in an erase state, and starting a rebuilding operation from at least one of the group areas, which includes an erase-state flag,
- wherein the controller scans only the group area at which the program operation stopped among the plurality of scan areas so as to reduce the time taken for a rebuild operation.
A method for operating a memory system, comprising:
- determining occurrence of a sudden power-off in a memory device that includes a memory cell array including a plurality of scan areas, each of the plurality of the scan areas including at least two group areas, each including plural pages and a single flag area for storing a flag that represents whether the plural pages of each of the group areas are programmed or not, wherein the flag is set when a program operation onto the plural pages of each of the group areas is completed;
- receiving flags for the group areas from the memory device when a power supply is resumed after the sudden power-off;
- searching which flag is in an erase state;
- and
- starting a rebuilding operation from at least one of the group areas, which includes an erase-state flag,
- wherein the starting the rebuilding operation includes scanning only the group area at which the program operation stopped among the plurality of scan areas so as to reduce the time taken for a rebuild operation.
Dependencies are inferred from the claim text.