I made a terrible mistake, still unsure how I did it.
Background:
Dual Parity system previously 4TB drives, now 6TB, only 6TB in system are the parity drives
Did a swap for Parity 1 - Copy Successful, rebuild successful
Did a swap for Parity 2 - Copy Successful, rebuild currently running
Get alert that Parity 2 has raw read error (in the thousands) - Odd for a new drive... This is where I discover my terrible mistake, I've accidently placed a drive that had 3.5 years of spin time on it from my other Unraid box instead of the new 6TB.
At this point I have paused the rebuild of the previous Parity drive (now a disk in the array) because I don't think I should trust the Parity 2.
What's the best way to resolve this with the least risk to data? Everything important on the array is offsite backed up... but if I can avoid bringing it back (and losing the unimportant stuff) I would like that.
Should I (and can I even) pull parity 2 and restart the data-rebuild of Disk 4 (the swapped disk) then once that is complete, add a new 6TB drive as parity 2 and have that start it's process?
Still unsure how this drive made it from my "destroy/recycle" pile back to the "on hand to swap if necessary" stack... I will be putting some failsafes in place to prevent that going forward. I cannot believe I did this... I am certainly kicking myself...