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by dannyw 912 days ago
Fascinating write up. As someone with a ZFS system, how can I check if I’m affected?
2 comments
moviuro 912 days ago
It's a very rare race condition, odds are very low that you were impacted. If you were, you would have noticed (heavy builds with files being moved around where suddenly files are zero).

[0] https://bugs.gentoo.org/917224

[1] https://github.com/openzfs/zfs/issues/15526 (referenced in the article)

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dist-epoch 911 days ago
https://github.com/openzfs/zfs/issues/15526#issuecomment-181...

> zpool get all tank | grep bclone

> kc3000 bcloneused 442M

> kc3000 bclonesaved 1.42G

> kc3000 bcloneratio 4.30x

> My understanding is this: If the result is 0 for both bcloneused and bclonesaved then it's safe to say that you don't have silent corruption.

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keep_reading 911 days ago
bclones were only one way to trigger the corruption. This is not a good way to check.

It's also not worth checking for because this bug has existed for many years. Your data probably wasn't affected. None of the massive ZFS storage companies out there ran into it by now either.

Your data is fine. Sleep easy.

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