You can find details on these parameters and their values in md's
documentation: http://www.mjmwired.net/kernel/Documentation/md.txt

A mismatch count can be checked by writing "check" to the proper file
as stated in line 376:
http://www.mjmwired.net/kernel/Documentation/md.txt#376

On Wed, Jan 20, 2010 at 6:34 PM, Brett Russ [off-list ref] wrote:

On 01/20/2010 10:03 AM, Jon Hardcastle wrote:

quoted

--- On Wed, 20/1/10, Brett Russ<bruss@netezza.com>  wrote:

quoted

What do you mean by mismatches detected?  How is this observed?

cat /sys/block/md4/md/mismatch_cnt

Someone else will need to comment on what this value pertains to and how it
should behave.

quoted

I have been able to get the info you asked for using mdadm -E but not
with the array stopped. I cant stop it just yet. What would you be
looking for in this data?

Simply that the "Update Time" and "Events" values matched across all
members, which they do.

-BR

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       Majed B.
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