Read/write errors on disk, but long SMART test passes

[Fatal_Flaw]

Here's what happened.

 

1. Disk 4 has read/write errors and gets disabled. 
2. Ran long SMART test on disk 4 with no errors.
3. Rebuild disk 4 on same physical disk. Completes successfully.
4. ~14 hours after rebuild completed successfully, disk 4 has read/write errors again and gets disabled.
5. ~3 hours after disk 4's errors, disk 5 has read errors but is not disabled.

 

At this point, I'm guessing I should replace the cables on disk 4 and disk 5, but am wondering if there's anything else I should try/do. Diags attached.

filebox-diagnostics-20210715-1153.zip

Edited July 15, 2021 by Fatal_Flaw

[Squid]

It definitely looks like a cabling issue.  Try reseating again.  (also check any power splitters etc -> they are the devil's bane)

[Fatal_Flaw]

Thanks, will do. I definitely have a rats nest of power splitters, so that's a good bet.