Hey everyone,

I just need to ask for guidance on troubleshooting steps, not really looking for deep dive in logs etc for now. My Unraid is setup with a 2 x 4tb IronWolf CMR drives and a combination of 6 SMR and CMR 4tb drives for the Data drives. I have noticed that after the weekly parity checks, the Parity Errors are fairly large. The first check from a couple of weeks ago I had over 70,000 errors and this week it's over 56,000. Now I did a quick smart check on all the drives and they are all coming back clean. I am now doing a Extended Self Check and the first Parity drive came back with no errors and I am testing the 2nd one now.

So I checked around and I have a few things I was told to check by AI:

• Check the SMART on all drives (all came back "no errors"

• check the cables for each drive to be sure they are well connected

• check the ram

• If none of the above is an issue, then SMR slowness may be the problem.

So I know a couple of things, my SATA cables are new, I purchased them a month ago because I thought I could have had SATA 1 or 2 cables. Swapped them all for new SATA3. The ram is not ECC but they are 64gb (4x16gb) of the same make and model kit. I may have 2 or 3 shucked drives from external HDDs that I put in, they would be Seagate Barracuda drives. No smart errors.

If I were to take your advice and look at logs or other secret locations, where should I start looking. Once I have a path I'm sure I can start sleuthing and looking for clues and solutions.

Thanks all!

Jacques.

Edited December 10, 2025Dec 10 by Ayanefan

Attach Diagnostics ZIP to your NEXT post in this thread.

All good. Issue resolved!

Maybe if you shared your solution it could help others.

I put a floor fan in front of the unraid server and cooled the drives down below 42c. When they hit 35c and under, the errors went away.

I just got peeved because I asked for some general troubleshooting, requested that I do the work myself and then I get the "Post your logs here" message. Not what I wanted, it doesn't force me to learn.

Ayanefan

8 hours ago, Ayanefan said:

I just got peeved because I asked for some general troubleshooting, requested that I do the work myself and then I get the "Post your logs here" message. Not what I wanted, it doesn't force me to learn.

You can look at your diagnostics yourself anytime.

If we had them, we could try to figure out what your problem was, and then tell you what we found in your diagnostics. That might have been instructive.

But lots of possible reasons for your problem. It could have taken a lot of time and back and forth and possibly useless guessing without any more information than you gave us. So that is why we ask for diagnostics.

If the fan did fix your problem, more likely you have a controller overheating than the drive temps themselves.