December 8, 20241 yr Currently running a 10 drive array. 2 Parity and 8 storage. I was swapping out the 2 current Parity drives for 2 larger drives. My plan was to replace the 2 Parity drives at the same time and then let the Parity rebuild. Once that was done I would swap the 2 smallest drives I have with the former Parity drives. With the old Parity drives sitting on my desk and the new ones in, I was able to boot up fine. Under Array Devices I change the Parity drives to the new ones. The other 8 drives were green, so I hit start array. Right after the array started up and both Parity drives were starting to rebuild, I noticed that Disk 7 had a red "X". I checked Disk 7 to see the issue was "UDMA CRC error count" and stopped the array. I shutdown the server. Then unplugged and reseated the cable from both the drive and motherboard. When I restarted Unraid, this time the drive was flat out missing from the Disk 7. At this point I panicked and tried putting to former Parity drives back in. Only to have Unraid think that they are "New" drives. While Disk 7 showing again with the "UDMA CRC error count" appearing again and also showing as a new drive. Array Operation is stating "Stopped. Invalid configuration. Too many wrong and/or missing disks!" At this point, is there a way to get Unraid to recognize the former Parity drives so I can recover?
December 8, 20241 yr Probably disturbed connections when replacing drives. Most common reason for rebuild issues and CRC is caused by connection problems. Attach Diagnostics to your NEXT post in this thread.
December 8, 20241 yr Author I agree about the connection being a issues but at this point Unraid thinks all 3 drives are new. hades-diagnostics-20241208-1027.zip
December 8, 20241 yr Since SMART for disk7 looks OK, I would do a new config to re-enable disk7 and try do sync both new parity drives again, after replacing the SATA cable for disk7, keep old parity drives intact for now, and if you don't mind having the array offline during the sync, do it in maintenance mode.
December 8, 20241 yr Author I was able to get a new cable for the Disk 7 and that fixed the CRC issue. The remaining issues is that both Party disks and Disk 7 are being detected as new disks and I am unable to start up the array at all. This image is the New Parity disks. This image is the old Parity disks. Edited December 8, 20241 yr by TillallR1in7
December 9, 20241 yr Solution 13 hours ago, TillallR1in7 said: are being detected as new disks and I am unable to start up the array at all. 15 hours ago, JorgeB said: I would do a new config to re-enable disk7 Tools - New Config - Keep all assignments - Apply.
December 9, 20241 yr Author Thank you for your help with this. The Parity drives are syncing as I type this. Edited December 9, 20241 yr by TillallR1in7
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