I have an array with 5 x 6tb disks in it

Unfortunately 4 of them are the Western Digital Red's that later got confirmed as being SMR, and they're pretty rubbish.
My plan was to cycle them out but my Parity is also 6tb so wanted to wait till I could afford some bigger drives

Today one of the disks is dead - 1292 read errors then went offline, so is currently being emulated

I've read https://forums.unraid.net/topic/187777-replace-dead-disc-new-larger-than-parity/ and believe the Parity Swap process will work for my situation.

My understanding is
- Power down server
- Remove the dead drive (it's already disabled in the array)
- Install the new 12TB Parity drive
- Power on the server - with array stopped
- Pre-clean new 12TB Parity drive
- Unassign the current 6TB Parity drive
- Assign the new 12TB Parity drive
- Assign the old 6 tb Parity drive to Disk 1 (the failed disk)

At this point Main -> Array Options should show me a copy function, which will copy the old parity drive to the new parity drive
This will take several hours, once complete I can start the array and the OLD parity drive now in Disk 1 slot will be rebuilt

I know this is all documented in the Parity Swap process but it's a "bit scary" copying the parity to a new disk and replacing a dead disk at the same time, not a process I've done before and was just looking for some reassurance that it's correct 🙂

That's basically it, preclear is optional.

Thank you kind sir, just wanted a bit of confirmation ❤️

Just wanted to follow up to say - failed disk rebuilt with zero issues.
Parity check done, now swapping out one of the other WD Red drives.... will do the last one in a few weeks - they're all off in the bin now 🙂