Rock G Posted August 1, 2018 Share Posted August 1, 2018 Hello everyone, I have been using unRaid for a little over 6 months and ran into my first issue that I need assistance with. I regularly run a parity check once a month but ran into some errors 2 nights ago, about 200+ parity errors, and disk1 ended up being mounted read-only. I also noticed a ton of read errors and corrections on one of my cache drives. After some googling I started the array in Maintenance mode, ran a filesystem check followed by a filesysten check with repair on disk1. Also, and I believe this is where I went overboard cause I'm a maniac and potentially created more issues, I started messing around with my cache drives. First I moved my shares off the cache drive to the array (appdata, system, downloads & domain), stopped the array, unmounted both cache drives, deleted each partition, reformatted in XFS, remounted then again formatted the cache disks after restarting the array. I then moved the same shares back to cache, restored appdata from backup then had to rebalance the cache drives because of dual profiles. After all of this I then restarted the parity check which usually runs for about 15-16hrs due to the size of my array. Fast forward this afternoon, I received an email notification that the parity check completed but now there are more errors, 615 to be exact. I have not done anything since the parity check completed aside from doing another diagnostic dump which I also did prior to running this 2nd parity check. Can someone please review both diags and provide guidance? I have a 2nd unRaid box which is basically a clone of Tower1 so worse comes to worse, I have my stuff backed up. I also just bought 2 new 12TB Ironwolf drives, (thanks to prime day!), which I was planned to use as an upgrade to both parity drives on Tower1 before all of this happened. With that said, I am fine blowing everything on Tower1 to start over then restore from Tower2 but I also welcome the learning opportunity in terms of troubleshooting and learning more about the system. Any feedback and guidance will be greatly appreciated. Link to comment
JorgeB Posted August 4, 2018 Share Posted August 4, 2018 Start by running memtest, also your cache1 SSD needs a new SATA cable. Link to comment
Rock G Posted August 8, 2018 Author Share Posted August 8, 2018 Thanks johnnie.black, I suspected cache1 contributed to the errors so I moved shares from the cache drive to the array then ran another parity check. It came back clean with no errors but as a precaution I followed your suggestion as well. I ran multiple passes of memtest and all passed error free. I also went ahead and replaced the sata cable on cache1 for good measure. Link to comment
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