The main folder is named 2018 and contains 195GB of data, which appears to be good. There is a lost+found folder with 1170 files. He said if that's all he lost, he'd be just fine with it. But obviously if we can get it back, that would be great. If not, I'd just like to learn how to rebuild the disk and get it working again.

Thank you!

Can I just swap in a new drive in the disk 2 slot and will it rebuild the data now that it seems to be emulating correctly?

Yes, that should work.

I replaced the disk and it did the rebuild, but it looks like there might be some issues with the Parity drive. It's showing 230,000+ errors. I have an 8TB drive that I can swap in it's place, which is something I wanted to do anyway.

How do I resolve the issue with the parity drive? There were a ton of these errors, but I ran the short SMART test (attached) on the drive and it said it was fine.

20-05-2026 19:53	Unraid Parity disk SMART health [197]	Warning [TOWER2] - current pending sector is 122	WDC_WD60EFRX-68L0BN1_WD-WX11D37444PZ (sde)	warning
20-05-2026 19:53	Unraid Parity disk SMART health [1]	Warning [TOWER2] - raw read error rate (failing now) is 6572	WDC_WD60EFRX-68L0BN1_WD-WX11D37444PZ (sde)	warning

Thank you!

WDC_WD60EFRX-68L0BN1_WD-WX11D37444PZ-20260521-0811.txt tower2-diagnostics-20260521-0819.zip

You should add attributes 1, 200 for monitoring on each of your WD disks.

Do an extended SMART self-test on parity.

@trurl Here is what I got.

Last SMART test result:

Completed: read failure

WDC_WD60EFRX-68L0BN1_WD-WX11D37444PZ-20260522-0937.txt

# 1  Extended offline    Completed: read failure       30%     35746         3477753040
# 2  Extended offline    Completed: read failure       90%     35738         3547641224

3 minutes ago, Spyderturbo007 said:

Completed: read failure

replace

I think I'm all set. I replaced the parity disk and the parity check shows as completed with 0 errors.

Thank you so much @trurl and @JorgeB ! I'm going to try and tackle the upgrade to 7.3.0 now and see how that goes. Fingers crossed!