Have a look at the MediaScan and the IntegrityScan jobs

https://community.emc.com/community/products/isilon/blog/2015/03/25/onefs-hardware-fault-tolerance

The MediaScan runs once a month by default, so you might just need to check recent results.

hth

Peter

So, there are no commands I can run to show CRC errors in real time? 

CRC errors encountered should be logged to /var/log/messages, or probably some other file in /var/log

Still weird to me that there isn't an easy command to run that gives a nice print out of interface stats (to include CRC errors). One thing NetApp gets right with the ifstat command

Ah -- I was referring to CRC errors used by the OneFS file system to protect stored data.

Regular network transmission is also protect by some CRC,

check out the netstat command for this. From the netstat man page:

When netstat is invoked with -i (all interfaces) or -I interface,

             it provides a table of cumulative statistics regarding packets

             transferred, errors, and collisions