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Comment by iberator | Hacker News Reader

Does zfs support error correcting instead of just finding (already) broken files?

I have been waiting for such a feature for like 15 years now. Without it, zfs is just a fad and useless filesystem (all that complexity for NOTHING).

ext2 for the win! still

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I don't know if I'm understanding your question, but ZFS actively corrects data on disk when it finds a checksum error [0]. Those checksum errors can be found when accessing that data, or doing a 'scrub' action that scans the whole volume to check integrity.

  0: https://klarasystems.com/articles/troubleshooting-zfs-common-issues-how-to-fix-them/

ZFS supports self healing, you do not have scrub, it will be corrected during a bad read as long you have a copy. Metadata has 2 copies by default for additional safety for a single disk.

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