April 8, 20251 yr My system is running it's regularly scheduled parity check (started on Sunday) and today one of my drives in the array (not a parity drive) was disabled due to a write error. The parity check is still running fine but I've never had this happen in the middle of a check and was wondering what the next steps are. Do I just let the check continue for the next few days? There was 1 sync error detected within the first few minutes of the parity check and I believe that is the first time that has happened as well. Will this sync error be affected by the disabled drive? Attached are the diagnostics. alexandria-diagnostics-20250408-1636.zip
April 8, 20251 yr Community Expert Solution Looks like a bad connection. Check connections, SATA and power, both ends, including splitters.
April 9, 20251 yr Author Well I guess that's better news than a failing drive. I'm a bit surprised since I haven't touched anything in awhile and this happened while I wasn't even home. Will this have any effect on the parity check or do I just let that continue to run and then do a rebuild once it's done?
April 9, 20251 yr Community Expert I would cancel the check and deal with the disk issue, and you should post new diags after array start and checking the cables
April 11, 20251 yr Author I have swapped out the power supply as I believe that might have been causing similar issues in the past. I will be rechecking all cable connections tonight after work and restarting the system. Is there a recommendation for checking that all drives are communicating properly before starting the array? I'd imagine the best approach would be some type of read test on each drive to check that the cables are all good. I've only ever done Preclear on new disks but I don't want to erase any existing data on these obviously.
April 11, 20251 yr Community Expert Looking/posting the diags after that can sometimes be enough to show issues, and then again after array start.
April 12, 20251 yr Author Here are the diagnostics after rechecking connections and rebooting. Do things look okay to start the array? Would doing a short smart test on each drive be any benefit to test the connections are all working properly? alexandria-diagnostics-20250411-2044.zip
April 12, 20251 yr Community Expert Self-tests don't really use the connections except to communicate the results. Looks good so far. Start the array and post new diagnostics so we can make sure emulated disk4 is mounting.
April 12, 20251 yr Community Expert Looks good. https://docs.unraid.net/unraid-os/manual/storage-management/#rebuilding-a-drive-onto-itself
April 13, 20251 yr Author Thanks for the assistance! Disk was able to rebuild and everything looks good. Going to restart the parity check now.
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