September 19, 2025Sep 19 I updated UNRAID from 6.12.5 to 6.12.15 just now, and I was able to mount all disk just fine. It randomly crashed after 30 or so minutes. After restarting the array, it now says my cache drive is Unmountable: Unsupported or no file systemI have read similar issues on the forums, but seen that same error is caused by different issues. I have attached my diagnostics if someone can help me out figure this out :) breakingnas-diagnostics-20250918-2319.zip
September 19, 2025Sep 19 Community Expert Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 1 wanted 0x3b4b8497 found 0x8db57166 level 0Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 2 wanted 0x3b4b8497 found 0x8db57166 level 0Checksum errors are being detected on both metadata copies. Recommend running memtest first, then see here for some recovery options:https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-543490
September 19, 2025Sep 19 Author 15 hours ago, JorgeB said:Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 1 wanted 0x3b4b8497 found 0x8db57166 level 0Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 2 wanted 0x3b4b8497 found 0x8db57166 level 0Checksum errors are being detected on both metadata copies. Recommend running memtest first, then see here for some recovery options:https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-543490I am doing a single pass memtest. Already over 50 errors in the first half of the test. I will be replacing the RAM when it completes.How does a RAM failure prevent the cache drive to mount?
September 20, 2025Sep 20 Author 17 hours ago, JorgeB said:Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 1 wanted 0x3b4b8497 found 0x8db57166 level 0Sep 18 23:04:39 BreakingNAS kernel: BTRFS warning (device nvme0n1p1): checksum verify failed on logical 585133408256 mirror 2 wanted 0x3b4b8497 found 0x8db57166 level 0Checksum errors are being detected on both metadata copies. Recommend running memtest first, then see here for some recovery options:https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-54341 hour ago, MexicanSkywalker said:I am doing a single pass memtest. Already over 50 errors in the first half of the test. I will be replacing the RAM when it completes.How does a RAM failure prevent the cache drive to mount?Changed the RAM, ran 1 pass on memtest and passed with new RAM. Tried mounting the array, same error on the cache disk. Here are the updated diagnostics.
September 20, 2025Sep 20 Community Expert 7 hours ago, MexicanSkywalker said:How does a RAM failure prevent the cache drive to mount?It can corrupt the metadata.6 hours ago, MexicanSkywalker said:Here are the updated diagnostics.Looks like you forgot those.
September 20, 2025Sep 20 Author 6 hours ago, JorgeB said:It can corrupt the metadata.Looks like you forgot those.I sure did! lolIf it comes to using the link you provided for data recovery. Is there a more detail guide I can follow? I am still learning about unraid and linux in general. For example for the first step, am I able to run those commands from the terminal in the dashboard webui?Does the array need to be in maintenance mode?In my case since it's the nvme cache drive, I should replace sdX1 for nvme0n1p1?When mounting the cache drive as read-only, will it mount it as an SMB?After am able to recover the data (if possible) should I just replace that drive or the corruption was mainly caused by the RAM failing?Probably easy questions for someone that has a deeper knowledge on this system, but for starters like me feels like a maze lol breakingnas-diagnostics-20250919-2035.zip
September 20, 2025Sep 20 Community Expert 27 minutes ago, MexicanSkywalker said:For example for the first step, am I able to run those commands from the terminal in the dashboard webui?Yes.27 minutes ago, MexicanSkywalker said:Does the array need to be in maintenance mode?No, it can be started in normal mode.27 minutes ago, MexicanSkywalker said:In my case since it's the nvme cache drive, I should replace sdX1 for nvme0n1p1?Yes.27 minutes ago, MexicanSkywalker said:When mounting the cache drive as read-only, will it mount it as an SMB?Nope.28 minutes ago, MexicanSkywalker said:After am able to recover the data (if possible) should I just replace that drive or the corruption was mainly caused by the RAM failing?The device should be fine, if the recovery options work, backup what you can, reformat, and restore the data.
September 20, 2025Sep 20 Author 48 minutes ago, JorgeB said:1 hour ago, MexicanSkywalker said: When mounting the cache drive as read-only, will it mount it as an SMB?Nope.I was able to move the files to a disk in the array. I am about to reformat the cache drive and move the files over again. Should I do this with cp -a command or use the Shares tab in the webui?How do I go about deleting the /temp folder (mkdir /temp) and unmounting the drive (mount -o rescue=all,ro /dev/nvme0n1p1 /temp)
September 21, 2025Sep 21 Community Expert 11 hours ago, MexicanSkywalker said:Should I do this with cp -a command or use the Shares tab in the webui?Either one will work; you can also use Midnight Commander, for example, mc on the console.11 hours ago, MexicanSkywalker said:How do I go about deleting the /temp folder (mkdir /temp) and unmounting the drive (mount -o rescue=all,ro /dev/nvme0n1p1 /temp)umount /temprm -r /tempYou can also just reboot
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