I have a 16 TB Parity drive and I lost a drive from the array that was 8TB. I replaced the drive assigned the new disk to the old drive space, but it seems that the drive did not rebuild from the previous drive. Is there anything I can do to get it back?

I have attached my diagnostics.

tower-diagnostics-20250914-1904.zip

Disk2 is empty. Did you format it during the rebuild?

These are the steps I followed to replace the drive. It took about 2 days for it to be all set, but the drive was empty when it said it was finished.

Those steps don't include formatting the drive, suggesting either it was already empty or you formatted it.

It was an empty drive.

It was a spare drive that was formatted on a PC to clear it and have it as a spare for whatever. I did no formatting when it was put in the array. I was in a bit of a panic when I tried to get things back. I should have taken a breath and... is there anything I can do from this point, or just deal with the consequences?

1 hour ago, ProblemWithField said:

It was an empty drive.

Do you mean it was already empty or the new drive was empty? Like mentioned, the disk had to be empty on Unraid or it was formatted in Unraid; it doesn't really matter what was done to the drive outside Unraid.

Also, the diags don't show the rebuild, so I'm assuming that's the drive that was replaced.

No it wasn't formatted in Unraid. I thought it would do it as I triggered the rebuild which it seems I didn't do correctly either. Can I redo the process over? Is there a place to point me to do it correctly?

7 minutes ago, JorgeB said:

Like mentioned, the disk had to be empty on Unraid or it was formatted in Unraid

There's no other option.

Rebuilding again will result in the same. If the disk was formatted, a file recovery tool like UFS Explorer might be able to recover the data; the free trial should show what it can recover.

Ok, thank you, Im at where I am at. I appreciate you taking your time with me.