On Mon, 23 Oct 2023, Michelle wrote:

OK - so basically, even though it can't repair damage, (as there is no
parity) at least it can flag up that checksums didn't check.

I just noticed this email now. In addition to ordinary user file data, zfs stores redundant metadata so if a bit of the metadata is corrupt, it may be able to repair it using a good copy. This is a reason to still scrub single-disk pools.

A reason to scrub single-disk pools periodically is to help discover when the disk is going bad so it can be replaced before there is much data loss.

Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
Public Key,     http://www.simplesystems.org/users/bfriesen/public-key.txt

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