Nonvolatile memory system and block management method

摘要

A nonvolatile memory system includes a memory area including a nonvolatile memory apparatus divided into a plurality of blocks, and a controller configured to control the memory area. The controller groups the plurality of blocks of the memory area according to wear level and whether each of the plurality of blocks is in use, and manages the blocks of each group in wear level order.

主权项

1. A nonvolatile memory system comprising:
a memory area including a plurality of blocks; and a controller configured to control the memory area, wherein the controller groups the plurality of blocks of the memory area according to whether a wear level of each block is less than a predetermined wear level limit threshold value and whether each of the plurality of blocks is in use, and manages blocks of each group in wear level order, and the controller includes a plurality of tables including a first table of blocks having a wear level less than the predetermined wear level limit threshold value and are not in use, a second table including blocks having a wear level greater than or equal to the predetermined wear level limit threshold value and are not in use, a third table including blocks having a wear level less than the predetermined wear level limit threshold value and are in use, and a fourth table including blocks having a wear level greater than or equal to the predetermined wear level limit threshold value and are in use.