Re: Monitoring not working as "dev stats" returns 0 after read error occurred

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On 2020-01-09 13:04, Nikolay Borisov wrote:
It seems there are other error codes which are
also ignored but can signify errors e.g. STS_NEXUS/STS_TRANSPORT.

Speaking of other errors also being ignored.

I just saw this on a different system:

BTRFS warning (device sdd1): csum failed root 5 ino 263 off 5869793280 csum 0xeee8ab75 expected csum 0x1fc62249 mirror 1

Is BTRFS trying to tell me that the file with inode number 263 is corrupt (checksum mismatch)? I did indeed read (copy) that file earlier so it sounds like BTRFS calculated its checksum to verify it and it didn't match the stored checksum.

The error counters returned by "dev stats" all stayed at 0 (even after scrubbing). This is (was) a single filesystem, no RAID.

Suppose this was an important file, should I be worried now?

If this was a checksum error, why does the stats command keep saying that zero errors have been detected?



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