Wear Leveling in Solid-State Drives: Managing NAND Flash Endurance Through Intelligent Block Allocation

固态硬盘中的磨损均衡：通过智能块分配管理NAND闪存寿命

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NAND flash memory cells degrade with each program/erase cycle—not write operation—so SSD controllers implement wear leveling to distribute erasures evenly across physical blocks, extending usable life by up to 8×.
Dynamic wear leveling remaps logical addresses to fresh physical blocks during writes, while static wear leveling periodically migrates infrequently changed data—like firmware partitions—to prevent ‘cold blocks’ from retaining excessive wear.

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