Notice Disk 3 was a 4TB disk and is not installed.  Here is screen of my current:

 

I think it was one or two years ago I removed that physical disk as I did not need it or want it.  I do not recall procedures.  Now, I think maybe there is a software procedure (shrink array) that  I did not do that I should have done, and that it is bad to leave it, because now I think my parity protection is being consumed for it, and If I loose another disk I really lose it.  Is that correct?

 

When I click "view" for disk 3, it shows zero folders and zero files, which is what I expected.

 

 

Edited February 23, 20215 yr by xrqp

53 minutes ago, xrqp said:

Now, I think maybe there is a software procedure (shrink array) that  I did not do that I should have done, and that it is bad to leave it, because now I think my parity protection is being consumed for it, and If I loose another disk I really lose it.  Is that correct?

Pretty much. Worse, you would lose everything in the emulated disk3 at the same time. You can replace disk3 with an 8TB normally, or a larger drive using

https://wiki.unraid.net/The_parity_swap_procedure

Thanks.  I will fix this right away.  I found my answer how to do it here 

https://wiki.unraid.net/UnRAID_6/Storage_Management#Replacing_disks

I can use the "normal replacement" even though I am going from 4TB to 8TB, because my parity is already 8TB.