EIO and data corruption on XFS file system

[GuangYang]

Hello,While working on the storage system, I got one question in terms of the XFS utilities to fix file system corruption. Basically, our storage system put 3 copies of data and the system would detect data inconsistency on regular basis, there are two patterns we observed so far: 1) the data is corrupted which result in an EIO, 2) data is still accessible but the content is changed.
I am wondering the way to fix such issues from file system's perspective, do we expect hardware failure for both cases or some xfs repairing tools could help for such case?
Thanks,Guang 		 	   		  
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