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1eeb2a6811
Directories still consume two full erase blocks, but now only program the exact on-disk region to store the directory contents. This results in a decent improvement in the amount of data written and read to the device when doing directory operations. Calculating the checksum of dynamically sized data is surprisingly tricky, since the size of the data could also contain errors. For the littlefs, we can assume the data size must fit in an erase block. If the data size is invalid, we can just treat the block as corrupted.