# Re: WARNING: mismatch\_cnt is not 0 on \<array device\>

- From: Benjammin2068 \<hidden\>
- Date: 2016-11-08 19:52:09 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2016/11/6633360
- Thread: https://ratatoskr.run/linux-raid/2016/11/6633360/t.md

```text
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?

Thanks,

 -Ben

```