Hello,
I had to shut down my PC because it hang up, after the next reboot i
got the following error:
BTRFS error on /dev/nvme0n1p4 bad tree block start 0 623771648
open_ctree failed
mount wrong fs type
bad superblock
missing codepage or helper program, or other error.
I had no backup (schame on my, now i made a backup of my failed parition)
I can't check or rescure any data, because all btrfs-progs stop with
messages like:
root@marcel-debug:/mnt# btrfs restore /dev/nvme0n1p4 /mnt/1
checksum verify failed on 623771648 found E4E3BDB6 wanted 00000000
checksum verify failed on 623771648 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=623771648, have=0
Couldn't read tree root
or
root@marcel-debug:/home/marcel/Desktop/btrfs-progs#
./btrfs-find-root /dev/nvme0n1p4
Couldn't read tree root
Superblock thinks the generation is 82096
Superblock thinks the level is 1
My bad installation had kernel 4.11 and my rescue installation has
also 4.11 installed. However the btrfs-progs had some problems
(endless loop for btrfs-find-root), so i decided to compile them
myself with the newest version 4.12 . However neither version works.
I am pretty sure that not all data is lost as i can grep thorugh the
100 GB SSD partition. But my question is, if there is a tool to rescue
all (intact) data and maybe have only a few corrupt files which can't
be recovered.
I put detailed information and commands outputs in pastebin:
https://pastebin.com/7kzjb4Ae
Best regards,
Marcel
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