[CentOS] puzzling md error ?

Clint Dilks clintd at scms.waikato.ac.nz
Sun Feb 28 21:27:11 UTC 2010


On 01/03/10 10:23, John R Pierce wrote:
> Peter Hinse wrote:
>    
>> Am 28.02.2010 22:03, schrieb John R Pierce:
>>
>>      
>>> WARNING: mismatch_cnt is not 0 on
>>>
>>>        
>> Have a look at http://www.arrfab.net/blog/?p=199
>> It says:
>>
>>
>>      
>>> A `echo repair>/sys/block/md0/md/sync_action` followed by a `echo
>>> check>/sys/block/md0/md/sync_action` seems to have corrected it. Now
>>> `cat /sys/block/md0/md/mismatch_cnt` returns 0 …
>>>
>>>        
> Thanks.  I was trying to figure out how from the mdadm commands (UGH!)
> to do a scan.
>
> # cat /sys/block/md10/md/mismatch_cnt
> 8448
> # cat /sys/block/md11/md/mismatch_cnt
> 7296
>
> fugly.  Since the mirrors aren't checksummed, can i assume this means
> there's likely some data messups here?
>
> Anyways, the repair is running on both md10 and md11, i'll check back
> with my final results...
>
>
>
>
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>    
Hi

It has to do with aborted writes in SWAP.  Your data should be fine


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