On Sat, Jan 4, 2020 at 10:07 AM Christian Wimmer <telefonchris@xxxxxxxxxx> wrote: > > Hi guys, > > I run again in a problem with my btrfs files system. > I start wondering if this filesystem type is right for my needs. > Could you please help me in recovering my 12TB partition? If you're having recurring problems, there's a decent chance it's hardware related and not Btrfs, because Btrfs is pretty stable on stable hardware. Btrfs is actually fussier than other file systems because everything is checksummed. > What happened? > -> This time I was just rebooting normally my virtual machine. I discovered during the past days that the system hangs for some seconds so I thought it would be a good idea to reboot my SUSE Linux after 14 days of working. The machine powered off normally but when starting it run into messages like the pasted ones. A complete dmesg leading up to the problem would be useful. Kernel messages at the last moments it was working, and also messages for the first mount attempt that failed. And kernel versions for both (sounds like 5.4 series). And also `btrfs check` output, no repair. > btrfs-progs-5.4]# ./btrfs restore -l /dev/sdb1 > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > checksum verify failed on 3181912915968 found 00000071 wanted 00000066 > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > bad tree block 3181912915968, bytenr mismatch, want=3181912915968, have=4908658797358025935 > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > checksum verify failed on 2688520683520 found 000000EE wanted FFFFFFEB > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > bad tree block 2688520683520, bytenr mismatch, want=2688520683520, have=10123237912294 > Could not open root, trying backup super > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > checksum verify failed on 3181912915968 found 00000071 wanted 00000066 > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > bad tree block 3181912915968, bytenr mismatch, want=3181912915968, have=4908658797358025935 > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > checksum verify failed on 2688520683520 found 000000EE wanted FFFFFFEB > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > bad tree block 2688520683520, bytenr mismatch, want=2688520683520, have=10123237912294 > Could not open root, trying backup super > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > checksum verify failed on 3181912915968 found 00000071 wanted 00000066 > checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 > bad tree block 3181912915968, bytenr mismatch, want=3181912915968, have=4908658797358025935 > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > checksum verify failed on 2688520683520 found 000000EE wanted FFFFFFEB > checksum verify failed on 2688520683520 found 000000D5 wanted FFFFFFA9 > bad tree block 2688520683520, bytenr mismatch, want=2688520683520, have=10123237912294 > Could not open root, trying backup super > btrfs-progs-5.4]# I'm not sure, the checksums found vs wanted look a little suspicious. -- Chris Murphy
