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Blursed
Asked: 2024-11-14 01:36:22 +0800 CST

Não é possível ler Superbloco - btrfs

  • 772

Socorro! Não consigo ler o Superbloco

Estava usando meu pc (arch) normalmente com o Android Studio rodando, de repente ele foi corrompido e pediu para reiniciar o IDE, pois o sistema de arquivos se tornou somente leitura, reiniciei o pc inteiro e agora não consigo montar o sistema btrfs. Usando o kernel LTS mais recente.

Sou novato nisso, usei o btrfs porque ele está se tornando o novo padrão.

Como eu conserto isso, por favor me ajude! Até agora eu tentei:

liveuser@localhost-live:~$ sudo btrfs rescue super-recover /dev/sdb3
All supers are valid, no need to recover

liveuser@localhost-live:~$ sudo btrfs rescue zero-log /dev/sdb3
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
WARNING: could not setup csum tree, skipping it
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
ERROR: could not open ctree

liveuser@localhost-live:~$ sudo btrfs scrub start /dev/sdb3
ERROR: '/dev/sdb3' is not a mounted btrfs device

liveuser@localhost-live:~$ sudo btrfs scrub status /dev/sdb3
ERROR: '/dev/sdb3' is not a mounted btrfs device

liveuser@localhost-live:~$ sudo mount -o usebackuproot /dev/sdb3 /mnt
mount: /mnt: fsconfig system call failed: File exists.
       dmesg(1) may have more information after failed mount system call.

liveuser@localhost-live:~$ sudo btrfs check /dev/sdb3
Opening filesystem to check...
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
Ignoring transid failure
ERROR: root [7 0] level 0 does not match 2

ERROR: could not setup csum tree
ERROR: cannot open file system

Também corri resgate

liveuser@localhost-live:~$ sudo btrfs rescue chunk-recover /dev/sdb3
Scanning: DONE in dev0                        
corrupt leaf: root=1 block=713392128 slot=0, unexpected item end, have 16283 expect 0
leaf free space ret -3574, leaf data size 0, used 3574 nritems 11
leaf 713392128 items 11 free space -3574 generation 368940 owner ROOT_TREE
leaf 713392128 flags 0x1(WRITTEN) backref revision 1
fs uuid 6d8d36ba-d266-4b34-88ad-4f81c383a521
chunk uuid 52ed2048-4a76-4a75-bb75-e1a118ec8118
ERROR: leaf 713392128 slot 0 pointer invalid, offset 15844 size 439 leaf data limit 0
ERROR: skip remaining slots
corrupt leaf: root=1 block=713392128 slot=0, unexpected item end, have 16283 expect 0
leaf free space ret -3574, leaf data size 0, used 3574 nritems 11
leaf 713392128 items 11 free space -3574 generation 368940 owner ROOT_TREE
leaf 713392128 flags 0x1(WRITTEN) backref revision 1
fs uuid 6d8d36ba-d266-4b34-88ad-4f81c383a521
chunk uuid 52ed2048-4a76-4a75-bb75-e1a118ec8118
ERROR: leaf 713392128 slot 0 pointer invalid, offset 15844 size 439 leaf data limit 0
ERROR: skip remaining slots
Couldn't read tree root
open with broken chunk error

e restaurar após o resgate

liveuser@localhost-live:~$ sudo btrfs restore /dev/sdb3 /dev/sda5
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
Ignoring transid failure
ERROR: root [7 0] level 0 does not match 2

WARNING: could not setup csum tree, skipping it
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
Ignoring transid failure
ERROR: root [5 0] level 0 does not match 2

Could not open root, trying backup super
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
Ignoring transid failure
ERROR: root [7 0] level 0 does not match 2

WARNING: could not setup csum tree, skipping it
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
Ignoring transid failure
ERROR: root [5 0] level 0 does not match 2

Could not open root, trying backup super
ERROR: superblock bytenr 274877906944 is larger than device size 209715200000
Could not open root, trying backup super

O disco rígido está saudável conforme smartctl. Nenhum setor realocado, e outras partições ntfs/ext4 estão funcionando bem.

Pelo menos se for possível recuperar os dados. Obrigado!

Estou devastado por ter perdido dados que foram esforços de anos. O único backup que tenho disso tem alguns meses, então muitas mudanças eu fiz depois disso. :'(

btrfs

1 respostas

  1. Best Answer

    Foi possível recuperar dados com o seguinte:

    sudo btrfs-find-root /dev/sdb3

    saída :

    parent transid verify failed on 711704576 wanted 368940 found 368652
parent transid verify failed on 711704576 wanted 368940 found 368652
WARNING: could not setup csum tree, skipping it
parent transid verify failed on 711655424 wanted 368940 found 368652
parent transid verify failed on 711655424 wanted 368940 found 368652
Superblock thinks the generation is 368940
Superblock thinks the level is 0
Found tree root at 713392128 gen 368940 level 0
Well block 711639040(gen: 368939 level: 0)

    então

    sudo btrfs restore -sxmSi -t 711639040 /dev/sdb3 /path/to/dest/
    • 0

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