Wear Leveling
Explore the concept of wear leveling in flash-based SSDs, a technique used by Flash Translation Layers to distribute erase and write cycles evenly across flash memory blocks. Understand why this process is crucial for preventing premature wear of popular blocks and how it impacts SSD performance through write amplification. This lesson helps you grasp the balance between durability and efficiency in SSD storage management.
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Finally, a related background activity that modern FTLs must implement is wear leveling, as introduced in an earlier lesson. The basic idea is simple: because multiple erase/program cycles will wear out a flash block, the FTL should try its best to spread that work across all the blocks of the device evenly. In this manner, all ...