Hello everyone,
I have a question: What exactly does the value for "no_csum" mean when
doing a scrub with the -R option? Example output:
> sudo btrfs scrub start -BR /
scrub done for ...
...
csum_errors: 0
verify_errors: 0
no_csum: 70517
csum_discards: 87381
super_errors: 0
...
In the btrfs header, I found the following comment for the "no_csum"
field of the btrfs_scrub_progress struct:
"# of 4k data block for which no csum is present, probably the result of
data written with nodatasum"
So my question is, why does scrub show a high (i.e. non-zero) value for
no_csum? I never enabled nodatasum or a similar option.
Best regards
Sebastian
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