Hello Hugo, thanks for your information. I have an 1 TB BTRFS-Partition which suddenly could not be mounted. I tried the following commands host@:btrfs check -b /dev/mapper/vg0-virtualbox .... Errors found in extent allocation tree or chunk allocation bytenr mismatch, want=1263661723648, have=0 host@:btrfs rescue super-recover -y /dev/mapper/vg0-virtualbox All supers are valid, no need to recover Then i did btrfs rescue chunk-recover -y /dev/mapper/vg0-virtualbox This commands fails after around 2.5 hours with the messages, that it could not recover the chunc tree. What are the next possibilities? Greetings, Michael
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