I recently stood up a 4 disk unRAID system.  As I was moving the bulk of my videos/pictures/etc. (400GB) onto and around my drives, however, I noticed a single error pop up on the SMU for the parity drive, followed several hours later by a single error on disk2.  Should I be concerned?  I've attached a screen shot of my SMU and a copy of my syslog.

 

Thanks.

Those are read errors.  Check cabling & make sure you're using a high-quality power supply.  Then run a couple parity-checks to see if any more occur.

Thanks.

 

I'll swap out existing cables and go with ones that use a clip to firmly position the connectors.  As to the power supply, I'm using an Enermax NoiseTaker II 600W (which I believe is a high-quality unit).  I've already run one parity check with no additional errors, but I'll run at least one more.