July 6, 20232 yr I am continually getting errors during a parity check. One just finished with 150 errors, and the one I ran a week ago had 595 errors. I send all logging to a syslog server, but I don't really know which log to look in or what to look for. I don't see anything wrong when I look at the S.M.A.R.T. information of each disk. I have a 15 drive array with dual parity. I am happy to provide any further information you guys might need. I have been running Unraid for about two years now. I am relatively technologically proficient. I can certainly follow directions well. Any insight would be appreciated.
July 6, 20232 yr Community Expert Run two consecutive parity checks without rebooting and post the diagnostics, or if you didn't yet reboot since that first check you ran just post current diags.
July 6, 20232 yr Author I have rebooted since the one with 595 errors. I will start another check now. The last one's duration was "2 days, 20 hours, 37 minutes, 52 seconds. Average speed: 64.8 MB/s" so it will be a few days before I can report back.
July 10, 20232 yr Author The latest parity check completed with no errors. It has not done that in a month. I don't know what the difference is except MAYBE the others had all been after a reboot? I attached the diagnostics. Consequently, after any reboot, I have always had 5 parity errors the next check that ran. I found some forum posts discussing a certain SAS controller or something that might cause such a thing. I have moved my parity disks off of my SAS controller, to just a PCIe x4 SATA expansion card, and those 5 errors always show up after a boot. Just thought it couldn't hurt to include that information. Anyway, hopefully this is nothing, but if the diagnostics show something wrong, I would be interested in knowing exactly what it is you look for in such things? Thanks in advance. ecnal-diagnostics-20230709-2007.zip
July 10, 20232 yr Community Expert If it's only after a reboot, and always 5 sync errors, it might be a controller.
July 21, 20232 yr Author Three checks in a row were multiple hundreds of errors. But then the there were none, and now I rebooted and ran another one and it had 5 errors again. I don't know what to do about the 5 errors. Do you think that over time getting those 5 errors constantly will cause me problems?
July 21, 20232 yr Author So, a few months back I moved the parity drives from the SAS controller to a standard PCIe SATA controller, thinking that would solve the sync errors issue, but those same 5 errors have continued. I think I will move both parity drives to motherboard connectors and see if that eliminates the errors. Thank you for your input. I am going to mark this as solved.
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