btrfs inspect-internal dump-super -af /dev/sdb4 | grep chunk_root
chunk_root_generation 687369
chunk_root 856119312384
chunk_root_level 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
chunk_root_generation 687369
chunk_root 856119312384
chunk_root_level 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
chunk_root_generation 687369
chunk_root 856119312384
chunk_root_level 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
backup_chunk_root: 856119312384 gen: 687369 level: 1
if i understand this correctly there is only one copy of the chunk
root in the whole fs and mine is corrupted?
On Wed, Nov 6, 2019 at 5:52 PM Sergiu Cozma <lssjbrolli@xxxxxxxxx> wrote:
>
> Hi, thanks for taking the time to help me out with this.
>
> The history is kinda bad, I tried to resize the partition but gparted
> failed saying that the the fs has errors and after throwing some
> commands found on the internet at it now I'm here :(
>
> Any chance to recover or rebuild the chunk tree?
>
>
> On Wed, Nov 6, 2019, 13:34 Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >
> >
> >
> > On 2019/11/5 下午11:04, Sergiu Cozma wrote:
> > > hi, i need some help to recover a btrfs partition
> > > i use btrfs-progs v5.3.1
> > >
> > > btrfs rescue super-recover https://pastebin.com/mGEp6vjV
> > > btrfs inspect-internal dump-super -a https://pastebin.com/S4WrPQm1
> > > btrfs inspect-internal dump-tree https://pastebin.com/yX1zUDxa
> > >
> > > can't mount the partition with
> > > BTRFS error (device sdb4): bad tree block start, want 856119312384 have 0
> >
> > Something wiped your fs on-disk data.
> > And the wiped one belongs to one of the most essential tree, chunk tree.
> >
> > What's the history of the fs?
> > It doesn't look like a bug in btrfs, but some external thing wiped it.
> >
> > Thanks,
> > Qu
> >
> > > [ 2295.237145] BTRFS error (device sdb4): failed to read chunk root
> > > [ 2295.301067] BTRFS error (device sdb4): open_ctree failed
> > >
> >
