Version : Unraid v 7.1.2

I purchased 5x 12TB refurbished disks from Amazon for my very first Unraid server. After only a few days parity + disk1 began having bad sectors.

Now I purchased 2X (new) 18TB disks as replacements, but I am unsure which is the correct method to replace them.

I used Unbalanced to MOVE all data from DISK1 to other disks, so the disk is empty.

My idea/guess is something like this :

1. STOP the array

2. REMOVE parity and DISK1 from array

3. POWER OFF server

4. Physically replace PARITY + DISK1 with the new disks

5. POWER ON server

6. ADD PARITY + DISK1 to array

7. START array

8. REBUILD parity

Would this be correct and a safe way to do this ?

Thank you for any help and guidance 🙌

Edited July 22, 2025Jul 22 by bjaergager
Added line about moving data away from disk1

If the disk is empty, you can do a new config, replace both disks at the same time, and re-sync parity.

Thanks for your reply JorgeB ☺

Could you explain what "a new config" means ? I am quite new to Unraid and would hate to mess it up.

Tools - New Config - Keep all assignments - Apply

Then reassign the new disks.

So I don't need to remove the defect disks from the config, just power off, replace, then new config ?

Yep