Hello, I have had a drive come up with read errors and get disabled in unraid. It is the 3rd such drive to do so in the last 8 months (different drives in different slots) and I am unsure at this point if its actually drive failure or something else in the system causing this. I am unsure of what to do at this point and if the drive needs to be replaced or something else like the LSI card. I have attached the system diagnostics with the "anonymize" option enabled, and would appreciate any advice or solutions to this. Thank you.

seruna-diagnostics-20251006-0442.zip

It's not logged as disk problem, and SMART looks fine, most likely a power/connection issue.

1 minute ago, JorgeB said:

It's not logged as disk problem, and SMART looks fine, most likely a power/connection issue.

Thanks for the response. Given that it is disabled and shows 2048 read errors, what would you recommend doing at this stage? If the drive is not the cause then I am unsure what else could be aside from possibly heat given there were temp warning earlier. If the drive is good then I would think the process to get it things back online is to take down array, unassign drive, start in maintenance mode, take down array, assign drive back to its slot, and rebuild on itself? Or would you recommend something else?

Replace/swap cable and try again.

1 hour ago, JorgeB said:

Replace/swap cable and try again.

Powering off, Swapping the cables, and rebooting has resulted in the system still showing the drive as disabled but no read errors now. I am assuming I would have to go through the previous process to clear the error/re-enable the drive? I am still unsure as to the root cause of the issue or what specific process should be followed at this point if the drive got disabled but still shows as good in SMART.

3 hours ago, Chocola said:

I am assuming I would have to go through the previous process to clear the error/re-enable the drive?

Yes, you would need to try and rebuild again, and post new diags if there are more errors.

The drive has finished rebuilding without error, so it seems like it may be fine? running an extended smart check on it now to be sure but appreciate the responses and advice. Do you have any idea what may have caused the drive to get disabled in the first place or how I can go about avoiding having it happen again, especially if there is not actual drive failure?

5 hours ago, Chocola said:

Do you have any idea what may have caused the drive to get disabled in the first place

On 10/6/2025 at 11:54 AM, JorgeB said:

most likely a power/connection issue.

If you haven't yet, recommend replacing the cables to rule that out.

Thanks for the help. All seems to be running smoothly after swapping the cables and rebuilding the disk onto itself.