April 9, 20251 yr Author 5 minutes ago, itimpi said: Were you running the check from the GUI or the command line? If the command line what was the exact command you used as it is easy to get it wrong? I am using it from GUI start array at maintenance mode, select disk3, and check file system status.. the quote is the result of the check file system, and fix button showed up
April 9, 20251 yr Community Expert Maybe we can get original 10TB parity to emulate disk3. Is original 10TB parity still plugged in?
April 9, 20251 yr Author 3 minutes ago, trurl said: Maybe we can get original 10TB parity to emulate disk3. Is original 10TB parity still plugged in? no, so i plugin 10 TB parity disk, start new configuration, and emulate disk3?
April 9, 20251 yr Community Expert Just to make sure nothing unplanned happens, go to Settings - Disk Settings, and set Enable autostart to No. Then shutdown, plug in original 10TB parity disk. You can remove new 12TB parity if you need to. Then reboot and post new diagnostics. Don't do anything else without further advice.
April 9, 20251 yr Author 15 minutes ago, trurl said: Just to make sure nothing unplanned happens, go to Settings - Disk Settings, and set Enable autostart to No. Then shutdown, plug in original 10TB parity disk. You can remove new 12TB parity if you need to. Then reboot and post new diagnostics. Don't do anything else without further advice. plug in 10TB original parity disk, start the array, and here is the diagnostic, Thank you tower-diagnostics-20250410-0325.zip Edited April 9, 20251 yr by jolma typo
April 10, 20251 yr Author 1 hour ago, trurl said: That is the diagnostics you already posted earlier. Sorry about that, here is the new diagnostic tower-diagnostics-20250410-0748.zip
April 10, 20251 yr Community Expert Go to Tools. New Config - Retain All - Apply. Assign 10TB parity, I think new disk3 should still be assigned and all others as before. Very important! Check Parity valid checkbox so parity will not be rebuilt, AND check Maintenance mode checkbox so no other disks are mounted. Start the array. This will accept all the assignments without doing anything else. Stop the array. Unassign disk3 Start the array in normal (not maintenance) mode. This will disable and emulate disk3. Then post new diagnostics.
April 10, 20251 yr Author 9 minutes ago, trurl said: Go to Tools. New Config - Retain All - Apply. Assign 10TB parity, I think new disk3 should still be assigned and all others as before. Very important! Check Parity valid checkbox so parity will not be rebuilt, AND check Maintenance mode checkbox so no other disks are mounted. Start the array. This will accept all the assignments without doing anything else. Stop the array. Unassign disk3 Start the array in normal (not maintenance) mode. This will disable and emulate disk3. Then post new diagnostics. new diagnostics tower-diagnostics-20250410-0855.zip
April 10, 20251 yr Community Expert Emulated disk3 is still not mountable. Check filesystem on emulated disk3 (the empty disk3 slot, not the unassigned disk) from the webUI. Post the output.
April 10, 20251 yr Author 53 minutes ago, trurl said: Emulated disk3 is still not mountable. Check filesystem on emulated disk3 (the empty disk3 slot, not the unassigned disk) from the webUI. Post the output. Check filesystem took long time, I duplicate unraid tab, and showing this: Phase 1 - find and verify superblock... couldn't verify primary superblock - not enough secondary superblocks with matching geometry !!! attempting to find secondary superblock... .found candidate secondary superblock... unable to verify superblock, continuing... .found candidate secondary superblock... unable to verify superblock, continuing... .found candidate secondary superblock... unable to verify superblock, continuing... 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could not find valid secondary superblock Exiting now. same as before... thank you
April 10, 20251 yr Community Expert We missed in this screesmnhot, and I guess you too, that there were read erros on disk4 during disk3 rebuild: Then can be seen on the syslog-previous from the next diags: Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125384 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125392 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125400 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125408 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125416 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125424 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125432 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125384 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125440 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125448 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125456 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125392 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125464 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125472 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125400 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125408 Disk4 is failing, so disk3 rebuild is corrupt, I'm array that the array is in a very precarious situation, and some data loss is likely.
April 10, 20251 yr Author 50 minutes ago, JorgeB said: We missed in this screesmnhot, and I guess you too, that there were read erros on disk4 during disk3 rebuild: Then can be seen on the syslog-previous from the next diags: Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125384 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125392 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125400 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125408 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125416 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125424 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125432 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125384 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125440 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125448 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125456 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125392 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125464 Apr 8 15:44:10 Tower kernel: md: disk4 read error, sector=1715125472 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125400 Apr 8 15:44:10 Tower kernel: md: recovery thread: multiple disk errors, sector=1715125408 Disk4 is failing, so disk3 rebuild is corrupt, I'm array that the array is in a very precarious situation, and some data loss is likely. so what is next step? replace both disks?
April 10, 20251 yr Community Expert You can't do that with a single parity, best bet is possibly trying to clone both failed disks with ddrescue to see what can be recovered, then rebuild parity with the clones. https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-525075
April 10, 20251 yr Author 2 minutes ago, JorgeB said: You can't do that with a single parity, best bet is possibly trying to clone both failed disks with ddrescue to see what can be recovered, then rebuild parity with the clones. https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-525075 I am thinking my option. A. If i just plug 2 new harddrive, what is the risks of losing data, both drive or part of data? and I will just copy manually from both drive into unraid array. B. I'm not good at linux, but i am confident when i learn it step by step (cannot do it on unraid because limitation on storage attach). Because of disk3 is new harddrive, so 1. clone disk3 previously 2TB into new 4TB 2. clone disk4 with new harddrive, 3. plug both into array and let rebuilding again? with smaller data loss compare to point A? Thank you
April 10, 20251 yr Community Expert ddrescue is IMHO the best option to save the most data, but note that if the clone is larger than the original disk, you will need to upgrade to Unraid 7.1, or the cloned disk won't mount.
April 10, 20251 yr Author 5 minutes ago, JorgeB said: ddrescue is IMHO the best option to save the most data, but note that if the clone is larger than the original disk, you will need to upgrade to Unraid 7.1, or the cloned disk won't mount. noted, I am thinking 1. clone disk4 with new HDD4TB (can i use clonezilla because only familiar with it, as my unraid licence limited to 6 storage, and I have to setup another machine for ddrescue) 2. plug clone hdd 4TB as disk4 and 10tb original parity to disk3 3. parity drive 12TB as previous So it is still the same as previous plan I think.. Thank you for your patience, Edited April 10, 20251 yr by jolma
April 10, 20251 yr Community Expert ddrescue was made specifically to recover the most that possible from a failing disk, it does multiple passes, backward and forwards, clonezilla will likely not be able to recover as much data.
April 10, 20251 yr Author Thank you, I'll install linux then.. , and updated when there is possible Edited April 10, 20251 yr by jolma
April 10, 20251 yr Author Sorry to keep posting, i have been thinking, if I unplugged all the drive but the disk3 and new harddrive, can I use unraid as ddrescue, then after finish I rearrange and plug everything back? and start the array? Thank you Edited April 10, 20251 yr by jolma
April 10, 20251 yr Community Expert 2 hours ago, jolma said: as my unraid licence limited to 6 storage BTW, to run ddrescue you don't need to start the array. 1 hour ago, jolma said: Sorry to keep posting, i have been thinking, if I unplugged all the drive but the disk3 and new harddrive, can I use unraid as ddrescue, then after finish I rearrange and plug everything back? and start the array? So you don't need to remove any disks.
April 10, 20251 yr Author 18 minutes ago, JorgeB said: BTW, to run ddrescue you don't need to start the array. So you don't need to remove any disks. Thank you, ddrescue on progress
April 11, 20251 yr Author Hello, ddrescue is finished for disk4, should I continue the script below? Quote printf "unRAID " >~/fill.txt next Quote ddrescue -f --fill=- ~/fill.txt /dev/sdY /boot/ddrescue.log and this script? Quote find /mnt/path/to/disk -type f -exec grep -l "unRAID" '{}' ';' can you guide me as I am a newbie, Do I type the script in unraid terminal? and the third script, how do i mount it? restart the unraid or start the array and mount disk4 with unassigned disk devices? or installing UD plugin, and then I still confuse about this guide, what is correct mount point, Quote Replace /path/to/disk with the correct mount point, all files containing the string "unRAID" will be output and those are your corrupt files, this will take some time as all files on the disks will be scanned, output is only displayed in the end, and if there's no output then the bad sectors were in areas without any files. currently the source drive is /dev/sdb and cloned drive is /dev/sdc thank you for your answer Edited April 11, 20251 yr by jolma
April 11, 20251 yr Community Expert 14 minutes ago, jolma said: Hello, ddrescue is finished for disk4, should I continue the script below? Post the clone results first.
April 11, 20251 yr Author 18 minutes ago, JorgeB said: Post the clone results first. Here is the results, hope it is readable, I cannot screenshot because I connect to unraid directly Edited April 11, 20251 yr by jolma
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