特别是Ext4利用日志校验和写屏障来减少由日志或乱序写入磁盘缓存(out - of - order write caching on hard drives)而导致的文件系统数据部一致的概率。

In particular it USES journal check summing and write barriers to help reduce the probability of data corruption from journals and out-of-order write caching on hard drives.

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ZFS通过为写入的每个块的元数据生成32位校验和(或256位散列)解决了此问题。

ZFS solves this issue by generating a 32-bit checksum (or 256-bit hash) for metadata for each block written.

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为了防止人们在该文件写入内容，苹果用校验和散列（checksum hash）函数对其进了加密。

To prevent people from writing to this file, Apple protects it with a checksum hash which has to be reverse-engineered.

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