How fix btrfs extent allocation tree chunk allocation ?

[aug7744]

Hello.
Thanks for reading my topic.

Strangely in an BTRFS partition show the errors below when running
sudo btrfs check --readonly --force --mode original --progress /dev/sdb1

Opening filesystem to check...
Checking filesystem on /dev/sdb1
UUID: 7846f603-7ca7-4f38-9a02-b71583dba767
[1/7] checking root items (0:01:04 elapsed, 2652028 items checked)
super bytes used 946388021248 mismatches actual used 94486411264098682 items checked)
[2/7] checking extents (0:01:35 elapsed, 98682 items checked)
ERROR: errors found in extent allocation tree or chunk allocation


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The BTRFS volume read correctly files and not any crashes or power failure have happened to do that error.

How fix that error in "extent allocation tree or chunk allocation" ?

 

[dos2unix]

Is /dev/sdb1 a mounted filesystem?

Do you have a LiveUSB you can boot from?

 

[f33dm3bits]

I read someone that you can try this.

btrfs check --repair

Btrfs - ArchWiki

wiki.archlinux.org

And you can try using scrub and balance.

Btrfs - ArchWiki

wiki.archlinux.org

Btrfs - ArchWiki

wiki.archlinux.org

 

[aug7744]

@dos2unix

The filesystem not is mounted.
Is possible boot in another disk for repair.
However the file acces is correct.
Only care about that type of error.

@f33dm3bits

command below can damage the file system
btrfs check --repair

Is more secure copy all files to another disk and reformat that partition.
scrub is much time to finish.