Hi everyone, would appreciate some advice on this please. On my server dashboard in the array section it says "array has 1 SMART error" and an amber thumbs down against disk 2. On the main tab, there are no errors showing against disk 2. When I click into disk 2, on the identity tab it says "SMART overall health: passed", but after running a self test, the self test tab shows "last SMART test result: completed: read failure." This is also shown in the SMART report which I've attached. I'm not sure how to interpret this - should I be replacing this disk straight away?

tower-smart-20240110-1707.zip

My personal policy is if there are actual errors reported by SMART I replace the drive. If it’s CRC errors or UNRAID being weird by disabling the drive, I’ll troubleshoot the issue that caused it. However as you’ll see I also have a thread asking if I need to replace drives so perhaps it would be best to wait someone one more knowledgeable than myself to chime in. 

 

Wouldn’t hurt to start looking at replacement options though

# 1  Extended offline    Completed: read failure       50%     34028         3822719824

Definitely replace

 

Also, you should click on any other WD disks you have and add attributes 1 and 200 for monitoring.

 

You should probably attach your Diagnostics to your NEXT post in this thread so we can check to see if you have anything else that might cause problems rebuilding that disk.

OK thanks for your help. Diagnostics attached.

tower-diagnostics-20240110-2213.zip

Other disks look OK, though disk2 is the only one that has had self-test, and it was already showing other problems anyway.

 

All disks mount including disk2, so rebuild to a replacement disk2 should be OK. Be careful with all connections when you replace. The main reason for problems is bad connections.

 

OK thanks again for your help, I'll replace and rebuild.