May 31, 20233 yr New user on trial version of Unraid so very possible something obvious! Version: 6.12.0-rc6 I have the following setup:- Parity 2TB, Data Array of Disk1 2TB, Disk2 1TB, Disk3 1TB, Cache 500GB + 500GB Raid0. These disks were what I had around and will be replaced with a new group of drives once I have familiarised myself with the system. Disk1 is showing increasing read errors and so I want to swap this disk out. My replacement disk is also a 2TB unit although not the same model. I have followed the procedure set out https://docs.unraid.net/unraid-os/manual/storage-management#data-disks To replace a failed disk or disks: 1. Stop the array. 2. Power down the unit. 3. Replace the failed disk(s) with a new one(s). 4. Power up the unit. 5. Assign the replacement disk(s) using the Unraid webGui. 6. Click the checkbox that says Yes I want to do this At step 5. I get a "wrong" under Disk1 and a red cross. Down at the Array Operation area I get "Stopped. Invalid configuration". The Start button is greyed out and "Too many wrong and/or missing disks. I never see step 6. I have tried this several times always with the same result. So, what am I missing? Thanks Len tower-diagnostics-20230531-0926.zip
May 31, 20233 yr Community Expert Disk4 is disabled, since there's single parity it's not possible to replace disk1 before rebuilding disk4.
May 31, 20233 yr Author Disk4 is unassigned. The minimum slot count is 6 so I assumed that that is why Disk4 shows up? There are only 4 disks showing on the dashboard.
May 31, 20233 yr Community Expert 3 minutes ago, len5623 said: Disk4 is unassigned. The minimum slot count is 6 so I assumed that that is why Disk4 shows up? There are only 4 disks showing on the dashboard. It looks like disk4 was assigned at some point in the past and never removed cleanly so Unraid has been emulating it.
May 31, 20233 yr Author At the moment I only have 4 sata ports so not sure how that has happened? Any way around this? I did a new config after this cropped up initially and the symptoms didn't change. Edited May 31, 20233 yr by len5623 added comment
May 31, 20233 yr Community Expert Solution You'd need to do a new config, resync parity, then replace disk1.
May 31, 20233 yr Author Disk2 and Disk3 are empty. I could replace Disk1 with original and then could shrink the array and then use one of those removed disks assigned to disk4 to sort out the issue?
May 31, 20233 yr Community Expert Not sure I follow, if you shrink the array you don't need to replace disk4, what I mentioned before would shrink the array to 3 disks + parity.
May 31, 20233 yr Author Went through the shrink array procedure and did the new config part (retaining drive assignments) and Disk4 went away so looks to be OK now.
May 31, 20233 yr Author Successfully swapped the bad drive out and rebulit array. Many thanks for the help Len
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