There is a Primus article emc62314 "How to clear field-replaceable unit (FRU) statistics in Navisphere Manager" . well clearing Statistical logging never worked for me but you can try that out. To best of my knowledge as you have mentioned that you cant see these errors anymore you should be good.
We are using CX4-120 SAN Array and one of the FC HD is reported to be faulty.  We have called vendor and got the HD replaced.  However, when we select that physical disk in Navisphere Manager, choose Properties >> Errors tab, we find that the "Number of Soft Write Error" = 126.  It seems tha the error for previous faulty HD hasn't been refreshed AS we cannot see any warning message in SP event log anymore.  Is there any way to update / referesh the statistics for the new FC HD ?  Thanks
How to remove error message after replacing a faulty FC HD?