LittleFS provides inherent wear leveling at the filesystem level:
- LittleFS automatically distributes writes across available flash blocks, avoiding repeated writes to the same physical location.
- Filesystem metadata is spread across the partition, preventing hotspots on metadata blocks.
- Updates are written to new blocks rather than overwriting existing data, naturally distributing erase cycles.
- As blocks become dirty, LittleFS reclaims and redistributes them, ensuring uniform wear across the entire partition.
- The filesystem tracks block usage patterns and preferentially allocates less-worn blocks for new writes.