Today I did start a non-correctional parity check on a dual parity array. Within the first 5 GB Unraid did report three disks with read errors (128 each) but did go on with the parity check.

 

I immediately canceled the non-correctional parity check. After that I did start a correctional parity check. This correctional parity check went thru the first 5 GB without any warnings/errors.

 

What's the status? The read errors just happened once? Why? The disks in question don't show any SMART problems. Something I need to worry about?

 

Many thanks in advance.

 

Diagnostics attached.

 

towervm01-diagnostics-20190703-0700.zip

Edited July 3, 20197 yr by hawihoney

3 disks with simultaneous errors on the same sectors points to a cable/power/controller issue.

Thanks for your answer.

 

What puzzles me is that it happened during start of the first parity check (non-correctional). This one was immediately canceled. The then re-started parity check (correctional) does not mention any problems at all.

 

BTW: It's a LSI 9300-8e HBA connected to a Supermicro BPN-SAS2-846EL1 backplane.

 

I guess, if the correctional parity check comes to a successful end I simply can ignore these 3x128 errors in the error column?

 

It's likely an intermittent issue, nothing to do if parity check is correcting or not, you can ignore the errors, and a reboot will clear them, but if it happens again you'll need to investigate further.

Thanks.