Re: WARNING: mismatch_cnt is not 0 on <array device>

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On 11/08/2016 12:47 PM, Benjammin2068 wrote:
> Hey all,
>
>  I'm still trying to work through this..
>
> I've replaced the cables on the new AOC-SAS2LP-MV8 and the card itself (supermicro sent replacements)
>
>
> but I still occasionally have the mismatch_cnt error.. (like a week will go by and a weekend raid-check will happen with  nothing.)
>
> So -- my question now (as recommended by someone else) is how to see if it's a drive issue somehow. (not that it's a "real" drive issue, but a card firmware issue that's aggravated by a drive's firmware somehow.)
>
> I've looked through the logs -- but how do I trace down a mismatch_cnt? I don't see anything in dmesg or messages....
>
> There are a couple 3Gb/s drives attached to this card.. maybe that's it? Who knows? But I don't have debug info to help me chase it down now that I'm trying to work it out with Supermicro tech support.
>
> Where do I look for more info about source or the event of the mismatch?
>
>

Now that I think about it -- and have been talking out loud to myself (I don't think I'm crazy)...

A parallel to all this is:

I don't think the mismatch_cnt started showing up until I moved from RAID5 to RAID6.

:O

How painful is it to switch back to RAID5 to test that theory?

 -Ben
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