June 23, 20251 yr Hi I have been having an issue with 2 of my drives not mounting.I have got replacement drives and am wondering the best way to recover as I started a parity sync with one drive not working but it stalled and messed up another drive.Any help with how to mount and get data (if possible) would be greatly appreciated Cheers-Sam albion-diagnostics-20250624-0232.zip
June 23, 20251 yr Community Expert Solution Jun 24 02:31:38 Albion kernel: BTRFS error (device md2p1): level verify failed on logical 102678528 mirror 1 wanted 2 found 0Don't remember seeing this error before, but try the recovery options here:https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-543490
June 26, 20251 yr Author I managed to recover the files off one of the drives to another drive using the mount degraded option.No luck with the other drive thoughbtrfs restore -vi /dev/md1p1 /mnt/disks/WSD5ATPN/restoreparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superroot@Albion:~# btrfs restore -vi /dev/sdg1 /mnt/disks/WSD5ATPN/restoreparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superparent transid verify failed on 293699584 wanted 10056931 found 10056914parent transid verify failed on 293699584 wanted 10056931 found 10056914Ignoring transid failureERROR: root [1 0] level 2 does not match 0Couldn't read tree rootCould not open root, trying backup superAm I screwed at this point, should I cut my losses?
June 26, 20251 yr Community Expert 3 hours ago, MysteriumUnLTD said:parent transid verify failed on 293699584 wanted 10056931 found 10056914This error is fatal with btrfs, lost writes by the devices, there's no fix AFAIK, if the link recovery options don't work, the only option is using a file recovery tool, like UFS explorer, it may still be able to recover some data, and the free trial should show if it can.
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