Re: Meaning of \"no_csum\" field when scrubbing with -R option

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Hello,

    Sebastian Ochmann posted on Wed, 19 Feb 2014 13:58:17 +0100 as excerpted:


        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.

Did you enable nodatacow option? if  nodatacow option is enabled,
data checksums will be also disabled at the same time.

No, never, not even on single files. Some additional info: The filesystem is only a few weeks old (even though I see similar results on an older filesystem as well), it's my root filesystem, and as mount options I use "rw,noatime,ssd,discard,space_cache" (it's on a SSD). Kernel version is 3.12.9.

Best regards,
Sebastian
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