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bcachefs is now in linux-next!
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this post was submitted on 22 Sep 2023
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The recommendation for ECC memory is simply because you can't be totally sure stuff won't go corrupt with only the safety measures of a checksummed CoW filesystem; if the data can silently go corrupt in memory the data could still go bad before getting written out to disk or while sitting in the read cache. I wouldn't really say that's a downside of those filesystems, rather it's simply a requirement if you really care about preventing data corruption. Even without ECC memory they're still far less susceptible to data loss than conventional filesystems.