RE: Strange Uncorrectable Section Count Produced By Fio

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> > However, I'd be somewhat worried that the "Offline uncorrectable
> > sectors" are changing at all. It is one of the few values that has a
> > strong predictive power of a spinning disk being faulty (see
> > https://www.backblaze.com/blog/what-smart-stats-indicate-hard-drive-
> failures/
> > ) but since you're on an SSD I don't know if it's predictive power is
> > as good.
> 
> If the uncorrectable error count were real, then I'd agree with
> you 100%. However, since those values appear only once during the
> early stages of a 24 hour fio job and don't appear again later with
> higher numbers of erros, and because the ddcli interface to the flash
> card shows no errors at all, I'm inclined to ignore them. The fio job
> finished fine.

and
> > Device: /dev/sdb [SAT], 37009733189632 Offline uncorrectable sectors
> > WARNING: Your hard drive is failing
> > Device: /dev/sdc [SAT], 54275501719552 Offline uncorrectable sectors
> > WARNING: Your hard drive is failing
> > Device: /dev/sdd [SAT], 71987946848256 Offline uncorrectable sectors

In hex, those are:
21A9_0000_0000
315D_0000_0000
4179_0000_0000

so they're clearly not real count values.  Some program might be
parsing fields incorrectly (e.g., off by 4 bytes).


---
Robert Elliott, HPE Persistent Memory


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