August 9, 20241 yr Hi everyone, So I decided to add a parity drive to my system (previous just had 2 drives in an array), however I did so when that drive (now parity) had 1 offline uncorrectable and the other drive was fine. Upon finishing the parity build, it found 336 errors and now the other drive is reading as 2 current pending sectors. It is reading as parity is valid, however if it couldn't read the data from disk 1, I don't think I trust the parity data. I know I need to replace these drives ASAP, but which should be replaced first? Or should I just load everything onto 2 fresh drives from a backup (really don't want to do this). Should I bother with a correcting parity check if it looks like the drives are failing? Diagnostics attached Thanks a lot g4nas-diagnostics-20240809-1841.zip Edited August 9, 20241 yr by mcor77
August 9, 20241 yr Community Expert Solution There's no good option, rebuilding disk1 may result in some corrupt data, and you if resysnc parity there will still be read errors from disk1. One option would be to copy everything you can to a new disk, that way you will at least know which files cannot be copied, if any, due to the read errors
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