Parity drive reports CRC Error - should it be replaced?

[Ablatem]

Hello,

I have one 18 TB parity drive that is showing - UDMA CRC error count. It just passed a parity check with no issues.
Should this drive be replaced?

I have 2 other 18 TB drives in an array.

Thanks in advance for your time.
 

[trurl]

This is a connection problem sometime in the past. You can acknowledge by clicking on the SMART warning for that disk on the Dashboard page, and it will warn again if it increases.

 

I usually just acknowledge the occasional CRC, maybe reseat the connector next time I'm in the case if I remember to. If it increases quickly you need to investigate.

 

The drive firmware validates incoming data by doing a checksum. If the checksum doesn't match, CRC is counted.

 

When this happens, data is resent, so usually there is no other problem. CRC might not even be logged as an I/O error.

 

And some connection problems won't cause CRC because no data was received to checksum.

[Ablatem]

@trurl -  thanks for your response. I did acknowledge the CRC and it says healthy as of now.
I will watch it for a couple of days and if nothing changes, I will close this. 

[Ablatem]

@trurl -  parity drive still healthy after 3 days.  I will continue to keep an eye on it.

Thanks again for your help.