Hello,

I think I have a problem with one of my array drives. Last year, I replaced a few drives with WD RED Pros, and a couple of days later, I saw a bunch of CRC errors for one drive, and then for another one (both new WDs). I thought it could be something with the SATA cables and replaced them. The issue seemed to be resolved until now. One drive's SMART report has one attribute marked as an error, but since the cable replacement, it has remained at the same level.

Recently, however, I noticed that I was unable to delete or create any files in one of my shares, and it turned out that the file system was read-only. I restarted the Unraid server, and it returned to normal operation. I've noticed a "BTRFS error (device md3p1): read time tree block corruption detected on logical" error.

md3p1 seems to be the one that still has SMART errors. Does this mean it needs to be replaced, or what are your suggestions?

Diagnostic attached.

tower-diagnostics-20240602-2108.zip

Run a correcting scrub on disk3 and post the results and new diags.

I clicked on "Scurb" with tic on "Repair corrupted blocks". But it seems to aborted it immediately.

tower-diagnostics-20240603-1227.zip

I rebooted the server and run Scrub but it seems to be aborted after 3 minutes.

tower-diagnostics-20240603-1339.zip

If the scrub is aborting there are some issues with the filesystem, recommend backing up that disk and re-formatting.

Is this the correct guide to follow along to do the re-formatting?
https://docs.unraid.net/unraid-os/manual/storage-management/#reformatting-a-drive

Yes, you can follow that.

Driver re-formatted and scurbing done without errors. Anything else I should check?

Do you recommend to run scrub from time to time?

45 minutes ago, Przemek said:

Do you recommend to run scrub from time to time?

It's good practice, like once a month, or every couple of months, and if new issues come up again soon it can indicate an underlying hardware issue.