I recently had one of my new drives go offline in my array. After checking, it reported file system corruption, so I started the array in maintenance mode and ran the fix, which seemed to have sorted it. A week or so later, I noticed my parity check was reporting a bunch of errors but the offending drive wasn't showing as offline, so I took the array down and once again started it in maintenance mode and ran a check. The drive yet again was coming up with file system corruption, so I ran the fix and it seemed to be ok. A week later, same thing again. I've just run the fix for the third time.

I'm hoping someone can save me a whole lot of troubleshooting here. I'm wondering if the drive is faulty? No SMART errors are being reported even after running an extended check. The drive is a WD Red (WDC_WD40EFPX) and installed about 3 months ago. Coincidentally and for context, I also had just upgraded Unraid to the latest release candidate 7.2.0 rc1. I'm now on the official release 7.2.0. I'm not sure if it's correlation or causation. Could it be a dodgy connection to the drive? I'm not sure that would manifest this way.

Anyone have similar experience? Any suggestions where I should start? I've probably blown away the logs now I've restarted the server. In hindsight, I should have saved logs to see if they revealed anything. Oops.

Post the diagnostics after there are read or write errors with the drive.