Hello all, 

 

Well, I jinxed myself saying how reliable my Samsung drives have been.

 

This afternoon I updated my Unraid OS to 7.0.1. I noticed right after I rebooted that the cache pool had a status of not started, but I assumed I had just caught it the INSTANT it came back up. I ran through fix common problems, everything looks fine. 

 

Now I am seeing an alert that I had a SMART failure. I click into it, and one of the cache pool drives is showing CRC error count 199: raw value: 6.  So, I'm not TOO worried about this, 6 seems like a pretty low number (that being said, this server hasn't been moved in 4 years so I feel like the cables are pretty good, right?) 

I ran a short SMART test, and it passed. I am running the long test now.

 

I am more concerned with the pool device status, which if I am reading it right, suggests serious problems - but maybe I'm not reading it right. 

I looked at my current and previous syslog, which goes back 90 days, nothing in there about the CRC errors. I attached them but I don't think there is anything interesting in there, the only real errors are some of my docker containers are out of date (I know) and I sometimes let my cache drive fill up (I know).

 

1.) The device that has 6 CRC errors is under warranty until December. Should I RMA it immediately (it would be free), or would it be wiser to just monitor it for a while, make sure it doesn't increase, and then acknowledge the error and move on? Should I replace the SATA cable if I decide not to RMA it? 

 

2.) Does the pool device status indicate anything I need to be worried about?

 

Thanks!

min-syslog-20250314-0905.zip min-syslog-previous-20250314-0906.zip

CRC errors are connection related (typically cabling or power) and rarely indicate problems with the drive itself.  When they occur they trigger retries on the read or write operation to happen so can affect performance.
 

The value is never reset so even after fixing the cause the count remains non-zero but only stops increasing.   

Sure, I get that (and thank you for confirming!).

 

What about that second part, with pool device errors?

 

Thanks again.

Those errors mean one of the pool devices dropped offline in the past, first, please post the diagnostics.

Oops, sorry I didn't attach that initially. Here they are - and thanks again for the help!

 

 

min-diagnostics-20250314-0915.zip

Pool is still all raid1 profile, that's good, so run a scrub and post the results.

Seems to be OK (attached). 

 

What now?

 

You can click "RESET" for the stats, then keep monitoring, would also recommend using the script below, that way you are notified if there's an issue again:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-700582

 

Thank you so much for the help!