November 3, 2025Nov 3 Hello everyone,The data disk 2 in my unRAID server died and I bought two 8TB drives to replace both the 4TB Parity and the dead drive. Here is what I did so far: 1. I shut down the server2. Put one 8 TB drive (as the new parity) in. 3. Started up and assigned that new 8TB to parity position 2. 4. Then at the bottom of the main tab started the parity-sync process. The sync is in progress and I‘m currently at hour 12 of 15. Now I think I‘ve done something incorrect, since all the guides online said I should unassign the first parity and put my new, bigger drive into position 1. I probably acted to quick before consulting any guide on how to do that process. I know. Rookie error. Did I make a mistake by having both assigned? Can I unassign the first drive after parity sync is completed and rebuild the contents of my dead 4TB data disk, from the new parity drive, onto my second new 8TB drive?Do I need to start over that whole process?Thank you very much in advance.
November 3, 2025Nov 3 Community Expert Solution To have replaced parity1 with a disabled disk, you would need to use the parity swap procedure.What you did also works, in a more roundabout way. When parity 2 finishes syncing, you can remove parity1 and use that to replace disk 2.
November 3, 2025Nov 3 Author 1 hour ago, JorgeB said:To have replaced parity1 with a disabled disk, you would need to use the parity swap procedure.What you did also works, in a more roundabout way. When parity 2 finishes syncing, you can remove parity1 and use that to replace disk 2.How do I install the second 8TB drive after that? Wait for the rebuild to finish and then do a completely new configuration (including parity)?
November 3, 2025Nov 3 Community Expert 13 minutes ago, 020120221422 said:How do I install the second 8TB drive after that? Wait for the rebuild to finish and then do a completely new configuration (including parity)?If you do not mind having parity2 and no parity1, then when the build of parity2 completes you can simply stop the array; unassign parity1 and assign it in place of the failed drive (disk2?) and then start the array to rebuild the failed drive.
November 6, 2025Nov 6 Author On 11/3/2025 at 12:43 PM, itimpi said:If you do not mind having parity2 and no parity1, then when the build of parity2 completes you can simply stop the array; unassign parity1 and assign it in place of the failed drive (disk2?) and then start the array to rebuild the failed drive.On 11/3/2025 at 11:14 AM, JorgeB said:To have replaced parity1 with a disabled disk, you would need to use the parity swap procedure.What you did also works, in a more roundabout way. When parity 2 finishes syncing, you can remove parity1 and use that to replace disk 2.Thank you for the help and quick replies. That all worked out and no data was lost.
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