Because CRC is in the on-disk data structure, not in the in-ram data structure. ... | Hacker News

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amtadt on July 26, 2024 | parent | context | favorite | on: Bcachefs, an Introduction/Exploration

Because CRC is in the on-disk data structure, not in the in-ram data structure. It is stripped upon reading to ram, and created upon writing to disk.

That's how bcachefs is designed right now.

koverstreet on July 27, 2024 [–]

No, we carefully carry around existing checksums when moving data.

Page cache is a different story, but doesn't apply to what we're talking about here.

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