Try this article
https://en.opensuse.org/SDB:BTRFS

On Thu, Jan 12, 2023, 5:43 AM Nate Bargmann <n...@n0nb.us> wrote:

> I have a Freedom Box Pioneer (hardware is an Olimex A20-OLinuXino-LIME2
> unit with a Samsung 128 GB micro-SD card.  The micro-SD is partitioned
> into 2GB boot ext2 and the remainder as the root partition as BTRFS.
>
> The thing has been crashing for months and now it started giving GPG
> signature errors when trying to run 'apt update'.  I copied the entire
> micro-SD card to an image file with dd so I have a backup.  Running
> 'btrfs check' resulted in a lot of errors so I ran the check and
> directed the output to a file which is over 2MB in size!  The following
> is a small snippet of what it in the file:
>
> [1/7] checking root items
> [2/7] checking extents
> checksum verify failed on 2337062912 found 00000098 wanted 00000025
> checksum verify failed on 2337062912 found 00000098 wanted 00000025
> Csum didn't match
> owner ref check failed [2337062912 16384]
> ERROR: errors found in extent allocation tree or chunk allocation
> [3/7] checking free space cache
> [4/7] checking fs roots
> checksum verify failed on 2337062912 found 00000098 wanted 00000025
> checksum verify failed on 2337062912 found 00000098 wanted 00000025
> Csum didn't match
> root 11670 inode 1109704 errors 200, dir isize wrong
> root 11670 inode 1109705 errors 2001, no inode item, link count wrong
>         unresolved ref dir 1109704 index 2 namelen 4 name json filetype 1
> errors 4, no inode ref
> root 11670 inode 1109706 errors 2001, no inode item, link count wrong
>         unresolved ref dir 1095383 index 2 namelen 11 name 20-json.ini
> filetype 7 errors 4, no inode ref
> root 11670 inode 1109707 errors 2001, no inode item, link count wrong
>         unresolved ref dir 978863 index 4 namelen 7 name apache2 filetype
> 2 errors 4, no inode ref
> root 11670 inode 1109710 errors 2001, no inode item, link count wrong
>         unresolved ref dir 1095409 index 2 namelen 11 name 20-json.ini
> filetype 7 errors 4, no inode ref
> root 11670 inode 1109711 errors 2001, no inode item, link count wrong
>         unresolved ref dir 978863 index 5 namelen 3 name fpm filetype 2
> errors 4, no inode ref
> root 11670 inode 1109714 errors 2001, no inode item, link count wrong
>         unresolved ref dir 978864 index 30 namelen 4 name json filetype 1
> errors 4, no inode ref
> root 11670 inode 1109734 errors 2001, no inode item, link count wrong
>         unresolved ref dir 45938 index 176 namelen 17 name
> gschemas.compiled filetype 1 errors 4, no inode ref
> root 11670 inode 1109735 errors 2001, no inode item, link count wrong
>         unresolved ref dir 6679 index 36 namelen 15 name giomodule.cache
> filetype 1 errors 4, no inode ref
> root 11670 inode 1109771 errors 2001, no inode item, link count wrong
>         unresolved ref dir 295871 index 242 namelen 24 name
> rsyslog.service.dsh-also filetype 1 errors 4, no inode ref
> root 11670 inode 1109784 errors 2001, no inode item, link count wrong
>         unresolved ref dir 978742 index 31 namelen 12 name readline.ini
> filetype 1 errors 4, no inode ref
> .
> .
> .
> ERROR: errors found in fs roots
> Opening filesystem to check...
> Checking filesystem on /dev/mmcblk0p2
> UUID: ea375ed2-d6e7-49d4-9b19-a624ba09b96c
> The following tree block(s) is corrupted in tree 11670:
>         tree block bytenr: 6562955264, level: 1, node key: (1109704, 96, 3)
> found 19331854402 bytes used, error(s) found
> total csum bytes: 14201108
> total tree bytes: 1242775552
> total fs tree bytes: 1160757248
> total extent tree bytes: 61292544
> btree space waste bytes: 327420862
> file data blocks allocated: 182356692992
>  referenced 113920880640
>
>
> Everything online hints that attempting repair is particularly
> dangerous, but what else am I to do?  At the moment the system is pretty
> much useless.
>
> All insights appreciated.
>
> - Nate
>
> --
> "The optimist proclaims that we live in the best of all
> possible worlds.  The pessimist fears this is true."
> Web: https://www.n0nb.us
> Projects: https://github.com/N0NB
> GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
>
>

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