You can detect the presence of back blocks from a failed flash operation (such as an Erase) or an invalid Write operation (discovered through an invalid Error Correction Code, or ECC).
如果flash操作（例如Erase）失败，或者Write 操作无效（通过无效的错误校正代码发现，Error Correction Code，ECC），那么说明出现了坏块。
A sector includes user data and overhead data, such as an Error Correction Code (ECC) that has been calculated from the user data of the sector.
扇区包含用户数据和额外开销数据，例如已依据扇区的用户数据计算的错误校正码(ECC)。
A sector includes user data and overhead data, such as an Error Correction Code (ECC) that has been calculated from the user data of the sector.
扇区包含用户数据和额外开销数据，例如已依据扇区的用户数据计算的错误校正码(ECC)。
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