System and Method for Selecting Blocks for Garbage Collection Based on Block Health

摘要

Systems and methods for garbage collection in a memory device are disclosed. The memory device includes a plurality of blocks that may be filled with data. In the event that the memory device needs to remove invalid data stored in the blocks, the memory device may perform a garbage collection process. To select the blocks for garbage collection, the memory device may examine both the number of invalid pages in the blocks and the health of the blocks (e.g., the program/erase cycles, erase speed, and program speed). Thus, the memory device may select the blocks for garbage collection that have the most invalid pages and are the healthiest. In this manner, the memory device may more evenly wear the blocks in the memory device.