November 22, 20214 yr My server recently locked up during update of a few docker containers. I was able to save a diagnostic. It appears that my docker.img had some corruption. I've since deleted it, created a new one and added back all my containers. I also ran a BTRFS scrub on my cache drive and it came back clean. What is concerning is that disk 1 in my array which has BTRFS filesystem reported 1 corruption. Nov 21 08:09:19 ur1 kernel: BTRFS warning (device dm-0): csum failed root 273 ino 9248 off 6311936 csum 0x1a753a94 expected csum 0x58a4bd31 mirror 1 Nov 21 08:09:19 ur1 kernel: BTRFS error (device dm-0): bdev /dev/mapper/md1 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 btrfs dev stats -c /mnt/disk1 [/dev/mapper/md1].write_io_errs 0 [/dev/mapper/md1].read_io_errs 0 [/dev/mapper/md1].flush_io_errs 0 [/dev/mapper/md1].corruption_errs 1 [/dev/mapper/md1].generation_errs 0 I'm currently running a BTRFS scrub on disk 1 to see if I will learn what file has issues. I can restore from a backup if necessary. I'm not sure if scrubbing will give me this information. This experience has me questioning my choice to use BTRFS. Advice would be greatly appreciated. Thanks. ur1-diagnostics-20211122-0833.zip
November 22, 20214 yr Community Expert 5 minutes ago, aberg83 said: I'm currently running a BTRFS scrub on disk 1 to see if I will learn what file has issues. I can restore from a backup if necessary. I'm not sure if scrubbing will give me this information It should list the affect file in the syslog. 6 minutes ago, aberg83 said: This experience has me questioning my choice to use BTRFS. It's up to you, but that if it's data corruption it's not a btrfs problem, it's only detecting corruption, of course xfs won't have that issue since it won't detect any data corruption.
November 22, 20214 yr Author Ok, I found the affected file. Deleted and restored from a backup. I assume the process now is to run a scrub and see if it comes back clean for disk 1? Not sure what caused the file corruption.
November 22, 20214 yr Community Expert 4 minutes ago, aberg83 said: I assume the process now is to run a scrub and see if it comes back clean for disk 1? I would wait some time and run another scrub, if more corruption is found there's likely an underlying hardware issue.
November 22, 20214 yr Author 2 minutes ago, JorgeB said: I would wait some time and run another scrub, if more corruption is found there's likely an underlying hardware issue. Thanks. I'll keep an eye on things. I have a scrub scheduled for Dec 1st. Does unraid send a notification for btrfs errors? I didn't get any with this recent error.
November 22, 20214 yr Community Expert 5 minutes ago, aberg83 said: Does unraid send a notification for btrfs errors? No, you'd need to check the log or have this enable for all btrfs filesystems: https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=700582
November 22, 20214 yr Author Thanks. That's a good script to have running. Any other recommended scripts to schedule when using btrfs? I have scrubs scheduled already.
November 22, 20214 yr Community Expert 22 minutes ago, aberg83 said: Any other recommended scripts to schedule when using btrfs? Not really, that one should detect any major issues.
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