My setup has two 2Tb parity drives. One of them failed, and I was left with a single parity drive and an emulated drive, 'Disk 1'. I installed a new replacement drive, following the advice in https://docs.unraid.net/unraid-os/using-unraid-to/manage-storage/array/replacing-disks-in-array/. However, I encountered a problem where in the advice it says "If you started in Maintenance Mode, go to the Main tab and manually click Sync to start the data rebuild." I couldn't find anything at all that said 'Sync' in the Main tab under Maintenance Mode. I clicked on something which seemed similar and the parity process started. It took about 24 hours to complete. Then I rebooted, everything came up correctly, but Disk 1 is still there with its little X next to it. According to the Shares tab my data is still there (and it also shows up with the little blue box icon before Disk 1). It is listed as being held in 'Array'. Has it transferred to the two Parity disks or is it still being held in the 'emulation' in Disk 1? I also can't understand why Disk 1 shows the FS as being ntfs. I have a suspicion that all is not well and that my data is at risk. How do I make sure the data is being held properly on the two Parity disks and how do I then get rid of 'Disk 1'? There is probably an answer to this, but I have done a lot of searching and nothing promising has shown up. I may be using the wrong terminology. Anyway, any help is much appreciated.

Your reply re the SSDs, HHDs and parity are much appreciated. I do remember seeing a reference to that in the documentation, but it had slipped my mind. Your question about the lack of a disk to be assigned as Disk 1: what is now the second Parity disk was supposed to do that. I think I now need to stop the array, remove that second parity disk, re-format it, and then reinstall it as a new data disk. Is that correct? Should I copy the emulated disk files onto a separate drive first, or can I copy after the drive is re-formatted and reinstalled?

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Persistent 'not installed' disk after disk failure and rebuild of array

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Solved by stokeymj

August 25Aug 25

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Saturday at 04:28 PM3 days

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Thank you @trurl and @itimpi . Your help and patience are much appreciated. I have everything up and running again and my set-up is much improved. I have followed your advice and am using only HDDs for the array and leaving the SSDs for pool jobs. 🙏

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Persistent 'not installed' disk after disk failure and rebuild of array

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Solved by stokeymj

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